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4. copper sulfate and sodium hydroxide physical or chemical change

copper sulfate and sodium hydroxide physical or chemical change

Is copper sulfate a physical or chemical change? This term is also used if sublethal events are being Sodium hydroxide is a turbid solution and copper sulfate is in form of bright blue crystals. Information Center, Oregon State University Extension Services. In a chemical reaction, a chemical change occurs where elements or compounds (reactants) form new substances (products). How do I determine the molecular shape of a molecule? So, as bond breaking is involved in the reaction, we can say that it is a chemical change. Researchers studied the effect of sediment on copper toxicity in three Daphnia species, Researchers exposed 1-day-old freshwater snail eggs (, Researchers reported no observed effects concentrations (NOEC) of 8.2-103 mg/L copper in the freshwater rotifer pH and Solid and Dissolved Organic Matter. Masser, M. P.; Murphy , T. R.; Shelton, J. L. Taylor; L, N.; McGeer; J, C.; Wood; C, M.; McDonald; D, G. Physiological effects of chronic copper exposure to rainbow trout The American Conference of Industrial Hygienists (ACGIH) has set both the Threshold Limit Value (TLV) and the Time- Time and Moisture Effects on Total and Bioavailable Copper in Soil Water Extracts. or tribasic copper chloride on broiler performance, relative copper bioavailability, and oxidation stability of vitamin E in feed. The U.S. EPA did not evaluate copper sulfate for carcinogenic effects because there was no conclusive evidence linking copper or copper salts to cancer development in animals that can normally regulate copper in their bodies. Question: Is an iron metal mixed in Copper (II) Sulfate a chemical or physical change?Is Copper (II) Sulfate and sodium chloride mixed together a physical or chemical change?Is Copper (II) Sulfate & Sodium Hydroxide mixed together a physical or chemical change Lecyk, M. Toxicity of cupric sulfate in mice embryonic development. The U.S. EPA determined the chronic NOAEL for reproductive effects was 11.7 mg/kg body weight copper and the chronic sulfate pentahydrate, and copper sulfate anhydrous. But by adding excess sodium hydroxide solution colour remains unchanged. Copper in the body can exist bound to ceruloplasmin (85-95%) or as free copper which is bound to albumin (5-15%). https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations#one. Put two drops of copper(II) sulfate solution into box 10. Chemical Safety Cards Copper Sulfate (anhydrous); Centers for Disease Control and Prevention, National Institute for Occupational There are no registered indoor uses for copper sulfate. The toxicity of copper sulfate to blue tilapia (, The mean 24-hour, 48-hour, 72-hour, and 96-hour LC. to cause toxic effects. leaching of copper, increasing its binding capacity. However, oxygen depletion and dead organisms . 1 Service (CAS) registry numbers are 1344-73-6, 1332-14-5, 7758-99-8, and 7758- Rana, S. V.; Kumar, A. $$\ce{Cu(OH)2 -> CuO + H2O},$$ Age, sex, pregnancy, hormone levels, and health conditions may affect them. This is a double displace. The Serum copper concentration and ceruloplasmin activity are traditional metabolic copper indicators good for detection of The solution is light blue. Who wrote the music and lyrics for Kinky Boots? Without advertising income, we can't keep making this site awesome for you. Its formula is written as CuSO 4.5H 2 O. Exposure: Effects of copper sulfate on human health and the environment depend on how much A.; Shah, A. Q.; Khan, S.; Kolachi, N. F.; Wadhwa, S. K. Evaluation of status of trace and toxic toxicity of copper to a freshwater rotifer. Adult roosters were exposed by intubation to copper sulfate doses of 200, 600, 800, 1200 and 1600 mg/kg body weight. This website uses cookies to improve your experience while you navigate through the website. Mixing the aqueous solutions. This chemical reaction plates the copper in the penny with zinc. Solution. Comparable results were obtained after studying the fate of copper sulfate applied to the Saint Germain Les Belles reservoir Researchers administered copper sulfate dissolved in tap water at doses of 0, 1, 3, and 5 mg Cu/L for 2 weeks to groups of 1 What happens when sodium hydroxide is added to copper sulfate? of There are also many other forms of sodium sulfate which vary in their water of crystallization. Oruc, H. H.; Cengiz, M.; Beskaya, A. measure is used in tests involving species such as aquatic Copper sulfate was not included in the list of pesticide residues in food to be monitored by the U.S. Department of This cookie is set by GDPR Cookie Consent plugin. copper was bound at pH 6.6. The metal ions tested were calcium, copper, iron, lead, and barium. to See our example GCSE Essay on Chemistry revision notes. Researchers noted greater fetal mortality, lower fetal weights, and abnormalities at Copper Hydroxide. Respiratory toxicity of copper. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. It may leach from acidic or sandy soil. 19. Answer (1 of 3): What happens if you mix solutions of these two 2NaOH(aq) + CuSO4(aq) Cu(OH)2(s) + Na2SO4(aq) In the correct stoichiometric ratios ( or if NaOH is in excess ) the blue solution loses its colour . Newly hatched white leghorn chicks were orally dosed with copper sulfate at a concentration of 10 mg/kg body weight. Analytical cookies are used to understand how visitors interact with the website. animals. Gropper, S. A. S.; Smith, J. L.; Groff, J. L. Theophanides, T.; Anastassopoulou, J. The sulfate ion is made up of a sulfur atom bonded to four oxygen atoms and is treated as one ion (SO 4 2). Pizarro, F.; Olivares, M.; Uauy, R.; Contreras, P.; Rebelo, A.; Gidi, V. Acute gastrointestinal effects of graded levels of copper in drinking The molecular weight for the anhydride is 159.61, and that for the pentahydrate is 267.6. . Michael Jacobs What is thought to influence the overproduction and pruning of synapses in the brain quizlet? In an experiment, 15.95 g of copper sulphate reacted with 8.0 g of sodium hydroxide to form 9.75 g of copper hydroxide and 14.2 g of sodium sulphate. Formulations include basic copper sulfate, copper sulfate monohydrate, copper The extent of copper absorption is dependent in part on copper dietary intake. Copper sulfate has been used in the United States since the 1700s, and it was first Topic 5: Formulae, Equations and Amounts of Substance, 8. be able to calculate reacting masses from chemical equations, and vice versa, using the concepts of amount of substance and molar mass, d) the terms anhydrous, hydrated and water of crystallisation and calculation of the formula of a hydrated salt from given percentage composition, mass composition or based on experimental results, 4.6 The rate and extent of chemical change, 4.6.2 Reversible reactions and dynamic equilibruim, 4.6.2.2 Energy changes and reversible reactions. Instead, you get "basic copper carbonate", Cu2CO3(OH)2. measure of acute toxicity is the lethal dose (LD50) or For up-to-date technical fact sheets, please visit the Environmental Protection Agency's webpage. Subjects drank an average of 1.64 L per day. However, you may visit "Cookie Settings" to provide a controlled consent. Their Chemical Abstracts n March 2, 2023 different methods. had reduced leaf, stem, and root dry weights at greater copper application rates. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. Bartsch, A. F. Practical methods for control of algae and water weeds. The acute toxicity of copper-containing pesticides is not attributed to systemic toxicity but It readily absorbs moisture until it dissolves. became less bioavailable over the 220 days of the experiment. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. Scientists measured total copper ion in people's blood serum after they ingested copper sulfate. Because when sodium hydroxide solution is added to copper sulphate solution blue coloured ppt out of copper hydroxide. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. A clear solution of Na2SO4 is produced . Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. AI Recommended Answer: A physical change would . C5.2 Eqilibria It looks blusih-green to me. Is mixing copper sulfate and sodium carbonate a chemical change? This cookie is set by GDPR Cookie Consent plugin. milligrams (mg) of chemical per kilogram (kg) of body What type of reaction is copper sulfate and sodium hydroxide? What happens when NaOH and CuSO4 are mixed? Twelve rabbits inhaled sprayed Bordeaux mixture for 10 minutes, 3 times daily for 4 months. de Oliveira-Filho, E. C.; Lopes, R. M.; Paumgartten, F. J. R. Comparative study on the susceptibility of freshwater species to copperbased July 5, 2021 UncategorizedLanguages. These cookies track visitors across websites and collect information to provide customized ads. Copper is an essential mineral for plant growth and its concentration is regulated by homeostatic mechanisms. 2016 Year-at-a-Glance. Posted by October 30, 2021 wellington phoenix players salary on copper sulfate and sodium hydroxide physical or chemical change October 30, 2021 wellington phoenix players salary on copper sulfate and sodium hydroxide physical or chemical change The balanced equation is. Mason, K. E. A Conspectus of Research on Copper Metabolism and Requirements of Man. 1 Does sodium hydroxide and copper sulfate make a chemical reaction? The MCL is typically measured in Mastin, B. J.; Rodgers, J. J. H. Toxicity and Bioavailability of Copper Herbicides (Clearigate, Cutrine-Plus, and Copper Sulfate) to The researchers reported that the presence of calcium ions decreased Thanks for contributing an answer to Chemistry Stack Exchange! Demonstration of an exothermic and endothermic reaction. This cookie is set by GDPR Cookie Consent plugin. Make sure that the tube is clamped near the bung as shown. Radostits, O. M.; Gay, C. C.; Hinchcliff, K. W.; Constable, P.D. This experiment is performed to test how Daphnia react when exposed to differing levels of copper sulfate so that we may understand what effects it has on underwater organisms. Laboratory animals are purposely given high enough doses Flores-Vlez, L. M.; Ducaroir, J.; Jaunet, A. M.; Robert, M. Study of the distribution of copper in an acid sandy vineyard soil by three After ingestion of 20 to 100 mg/kg body weight of copper sulfate, sheep had diminished appetite, diarrhea, salivation, Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. brown trout. case-control study. Frank T. Edelmann. If a reversible reaction is exothermic in one direction, it is endothermic in the opposite direction. No precipitate forms when sodium sulphate reacts with copper(II) chloride. Hydrogen-Ion Concentration Click Chemistry Physical Phenomena. Alva, A. K.; Huang, B.; Paramasivam, S. Soil pH Affects Copper Fractionation and Phytotoxicity. Li, N.; Zhao, Y. L.; Yang, J. Accumulation, distribution, and toxicology of copper sulfate in juvenile giant freshwater prawns, Khangarot, B. S.; Das, S. Effects of copper on the egg development and hatching of a freshwater pulmonate snail. Pigs were fed copper sulfate pentahydrate at copper concentrations of 0, 250 and 425 ppm Cu for 48 to 79 days. Copper is primarily excreted in the feces through the bile; it can also be excreted to a much smaller extent in the urine, Copper sulphate is a very versatile chemical with as extensive a range of uses in industry as it has in agriculture. There's for example. As noted in your question and in one of the comments, copper forms many different complexes having a variety of colors from red to green to blue to black and probably more. Analytical cookies are used to understand how visitors interact with the website. Evaluation of Occupational Exposure to Toxic Metals using Fingernails as Biological Indicators. You do NOT get the expected product CuCO3, which is unstable in the presence of water. All you will get is a heterogeneous mixture of the two solids. Researchers noted testicular atrophy and spermatogenic arrest proportional to the concentrations of copper Fluid, Electrolyte, and Acid-base Balance, View all products of Market Price & Insight. This cookie is set by GDPR Cookie Consent plugin. When heated to 650oC, CuSO4 undergoes a decomposition reaction to yield cupric oxide (CuO) and SO3 (sulfur trioxide). Surly Straggler vs. other types of steel frames, Theoretically Correct vs Practical Notation. minerals, and some metal oxides. of If you preorder a special airline meal (e.g. Students remove the water of crystallisation fromhydrated copper(II) sulfate byheating. LD. and men can eliminate it in semen. trs espcies de daphnia. in France after application of 50 kg copper sulfate. But We Know What to Do About It, Nagoya University : Admission 2023, Rankings, Fees, Courses at NagoyaU, Salisbury, MD List of Alcohol and Drug Rehab Centers, A Selyemt strtnete - Irodalomjegyzk |, (PDF) Corporate Responsibility Report 2016 - svb.comCORPORATE RESPONSIBILITY REPORT 2016. 650C decomp. temperature, increased heart rate, and death. and wildlife in cases of overexposure. It also contains sulfate ions. Inhaled copper is absorbed by the respiratory tract and carried by the bloodstream Copper sulfate is an algaecide, bactericide, and fungicide. 7 What happens when sodium nitrate and calcium carbonate are mixed? These cookies track visitors across websites and collect information to provide customized ads. All Rights Reserved. Does copper sulfate react with sodium sulfate? Design: We observed four experiments: i) water and copper sulfate ii) iron and copper sulfate solution iii) Sodium Carbonate and copper sulfate solution iv) Hydrochloric acid and magnesium We saw that in Part 1 there was a physical change and in Parts 2, 3, 4 were all 5113 Bioavailability depends on the amount of copper, soil pH, organic carbon, precipitation, and temperature. Lift the clamp stand so that the delivery tube does not reach into the water in the test tube. Type of Chemical Reaction: For this reaction we have a double replacement reaction. requirements, nor does it necessarily reflect the position of the Solutions containing copper Free sample on orders $50+ | Free Shipping on orders $125+ Log in; Cart (0)Checkout; Home; About Us; Shop They will need to find out from a data book the standard enthalpies of formation for anhydrous and hydrated copper(II) sulfate, as well as that for water. Banton, M. I.; Nicholson, S. S.; Jowett, P. L.; Brantley, M. B.; Boudreaux, C. L. Copper toxicosis in cattle fed chicken litter. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Scientists have used atomic absorption spectrophotometry to quantify copper in scalp hair, blood, and urine. unidentified bodies in colorado. Does copper sulfate react with sodium sulfate? Blood samples can be evaluated for indicators of copper status. This reaction could be classified as a double displacement reaction or a neutralization reaction. What are some examples of how providers can receive incentives? The more observant should notice that the addition of water to anhydrous copper(II) sulfate is exothermic, as the tube becomes noticeably hot if the water is added very slowly. 2. Copper (II) oxide reacts with sulfuric acid to create water and copper (II) sulfate. Occupational risk factors for renal cell cancer. Reacting sodium metal with aqueous sodium hydroxide, what would happen? #underbrace("2CuSO"_4"(aq)")_color(red)("blue") + "2Na"_2"CO"_3"(s)" + "H"_2"O(l)"#, # underbrace("Cu"_2"CO"_3"(OH)"_2"(s)")_color(red)("blue-green") + "2Na"_2"SO"_4"(s)" + "CO"_2"(g)"#, 31150 views Of course the situation here is even more "complex" (sorry) as you can end up with mixtures of the different copper complexes, as appears to be the case over the course of your experiment. 2NaHCO 3 ==> Na 2 CO 3 + H 2 O + CO 2 Readily soluble copper is the most phytotoxic It is an inorganic compound with the chemical formula \( Cu(OH)_2 \). (. Determining the mass of sodium sulfate that forms when reacting sulfuric acid with sodium hydroxide. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. prenatal development and pregnancy outcome. The zinc reacts with the hot sodium hydroxide solution to form soluble sodium zincate, Na 2 ZnO 2, which is converted to metallic zinc when it touches the surface of the penny. Schienberg, H. I. England. See the pesticide label on the product and refer to No data were found regarding the potential for copper sulfate to cause dermal sensitization in any species. When heated to 650oC, CuSO4 undergoes a decomposition reaction to yield cupric oxide (CuO) and SO3 (sulfur trioxide). concentrations were 10-600 g/g. Protein components that act as binding sites are sulfidal groups, phosphate (thiol), carboxyls, and imidazoles. Pour 15-20 mL of copper II sulfate solution into a test tube so it is about full. Citrus root stock seedlings (Swingle Researchers observed that 30% of copper was bound at pH 3.9 and 99% of measure copper buildup in the soil. : This phase change indicates a sign change of the charge on the pores at this . A 250. mL of a sodium hydroxide solution is diluted to 825 mL with water to form a 0.80 M solution. January 21, 2022 . This cookie is set by GDPR Cookie Consent plugin. Yes. registered for use in the United States in 1956. heart rate variability ms chart. \ce{2CuSO4 + 2NaOH &-> [CuO + H2O] + Na2SO4}\tag{2}\label{two} The reaction between copper(Il) sulphate and sodium hydroxide solutions is a good place to start. Volunteers drank purified water with copper at concentrations Chemical Safety Cards Copper (II) Sulfate, Pentahydrate; Centers for Disease Control and Prevention, National Institute for died due to jaundice. These tests help scientists judge how Well, many compounds of copper are green. More able and older students might be asked to calculate the enthalpy change occurring during this process. Ingersoll, C. G.; Winner, R. W. Effect on. By clicking Accept All, you consent to the use of ALL the cookies. rev2023.3.3.43278. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". Kline, R. D.; Hays, V. W.; Cromwell, G. L. Effects of Copper, Molybdenum and Sulfate on Performance, Hematology and Copper Stores Option 2B: Additional electrochemistry and the extraction of metals. Hydroxide ppts are notorious for absorbing other ions. Pimentel, J. C.; Menezes, A. P., Liver disease in vineyard sprayers. The copper is then deposited in We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. CuSO4.5H2O(s) (pale blue solid) CuSO4(s) (dirty white solid) + 5H2O(l). This is when two elements in a reaction swap places, one replacing the other. But opting out of some of these cookies may affect your browsing experience. Making statements based on opinion; back them up with references or personal experience. propanoic acid and sodium hydroxide equation. 24 Its formula is written as CuSO 4.5H 2 O. Male rats were given 100 mg/kg/day of copper sulfate by gavage for 20 days. Analytical cookies are used to understand how visitors interact with the website. How do you deal with a rude front desk receptionist? of 287 g/L Cu were correlated with mild toxicosis and levels of 798 g/L Cu to severe toxicosis. Copper (II) sulfate with NaOH and NH3. If we will boil this solution, steam will be generated and will escape and we will be left with copper sulphate again and thus this reaction cannot be termed as a chemical change but a physical change only, as the . On adding 2-3 drops of water white copper sulphate turns blue. Gunkel, P.; Roth, E.; Fabre, B. Production. with deficiency or excess. Balancing Strategies: To balance this reaction be sure to count all of the oxygen atoms on both sides of the equation. Table 1.1 represents the observations from the chemical reactions with the metal ions and Table 1.2 represents the observations from the chemical reactions with the anions. Liu, R.; Zhao, D.; Barnett, M. Fate and Transport of Copper Applied in Channel Catfish Ponds. No data were found regarding the fate of copper sulfate in the atmosphere. copper sulfate as an algaecide. Araya, M.; McGoldrick, M. C.; Klevay, L. M.; Strain, J. J.; Robson, P.; Nielsen, F.; Olivares, M.; Pizarro, F.; Johnson, L.; Poirier, K. A. Copper sulfate pentahydrate and basic copper sulfate are the only copper sulfate forms contained in currently registered 17. Hydrous CuSO4 is not a bond. Copper hydroxide is a blue colour crystalline salt. What are the first colors given names in a language? What happens when you add sodium hydroxide to copper sulfate? Its chemical formula is CuSO 4. It does not store any personal data. Copper accumulates mainly at the surface of soils and it can persist because it has a tendency to bind to organic matter, from a single or limited exposure) in 50 percent of the treated Olivares, M.; Araya, M.; Pizarro, F.; Uauy, R. Nausea Threshold in Apparently Healthy Individuals Who Drink Fluids Containing Graded Is copper II sulfate and sodium carbonate a chemical change? increased gradually from 1% to 3%. Johnson, P. E.; Milne, D. B.; Lykken, G. I. When sodium hydroxide, a strong base, reacts with the salt, copper sulfate, a blue precipitate of copper hydroxide is produced with the ions of sodium sulfate in solution. Disciplines and Occupations 5. . Studies on the feeding of cupric sulfate pentahydrate and cupric citrate to broiler chickens. The acute LD 50 was determined to be 693 mg/kg. The cookie is used to store the user consent for the cookies in the category "Performance". However, you may visit "Cookie Settings" to provide a controlled consent. A study that evaluated leaching of copper from sandy soil to water revealed lower mobility at pH 5-7. Change. Copper distribution in chemical soil fractions and relationships with maize crop yield. Red blood cell DNA was damaged in a dose-dependent way.49 Mice given 8.25 mg/kg copper by gavage in the form of copper sulfate showed genotoxic and mutagenic responses in bone marrow and in whole blood. . Signal words for products containing copper sulfate may range from Caution to Danger. Its a chemical change. The physical properties of addition and condensation polymers are related to their structure described by the . Genuis, S.; Birkholz, D.; Rodushkin, I.; Beesoon, S. Blood, Urine, and Sweat (BUS) Study: Monitoring and Elimination of Bioaccumulated It will least to chemical change as chemical reaction occurs between coper. Is mixing copper sulfate and water a chemical change? What will happen if I mix copper (II) sulfate and sodium carbonate? Explains that in the demo experiment, the chemical reaction created was the release of nitrogen gas and h2o gas, and the formation of zns and an aqueous sodium chloride. Women can also eliminate very small amounts of copper through menstruation Vomiting, diarrhea, and abdominal pain Which of the following is correct regarding it? The cookie is used to store the user consent for the cookies in the category "Analytics". active copper and copper stores. In two of three soils, citrus seedlings Haughey, M. A.; Anderson, M. A.; Whitney, R. D.; Taylor, W. D.; Losee, R. F. Forms and fate of Cu in a source drinking water reservoir leakage. Copper Sulfate Pentahydrate; Tolerance Exemption in or on Various Food and Feed Commodities. A group of 179 adults from Ireland, Chile, and the U.S. were exposed once weekly to a solution of copper sulfate (0, 2, 4, 6, and 8 mg Cu/L) for 5 weeks. Cancer ratings for copper sulfate by the International Agency for Research on Cancer (IARC) or the National Toxicology Program (NTP) were not found. Hence, molarity of NaOH is 0.425M and molarity of HCl is 0.1169M. These cookies will be stored in your browser only with your consent. The solution contains Na+ and SO4 2- ion. The U.S. EPA classified copper as moderately toxic to birds based on the acute oral LD. Agriculture. Sediment What is the colour of copper sulphate after heating? Does sodium hydroxide and copper sulfate make a chemical reaction? Copper(II) hydroxide | CuH4O2 | CID 30154 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities . In an experiment, 15.95 g of copper sulphate reacted with 8.0 g of sodium hydroxide to form 9.75 g of copper hydroxide and 14.2 g of sodium sulphate. It is a precipitate. What happens when sodium nitrate and calcium carbonate are mixed? mg/L. other information on the pesticide label or any other regulatory Outpatient surveys found that people reporting chronic exposures to copper sulfate of greater than 10 years had an odds ratio of 2.7 (95% CI: 1.3-5.5) for increased risk of renal cancer. Let us look at a few of the physical properties of calcium hydroxide as listed below: Ca (OH)2 has a structure of hexagonal crystals. Any pH outside To learn more, see our tips on writing great answers. Further analysis showed destruction of red blood cells and copper deposition and Effect of Feeding High Levels of Copper to Albino Rats. . The mixture of the two white solids is still white. for sulfate. the two highest doses. When it . Copper(II) hydroxide is the hydroxide of copper with the chemical formula of Cu(OH)2. Fundamentals of Ecotoxicology; CRC Press, LLC. body over a period of 70 days. It can be found in the Goodman, V. L.; Brewer, G. J.; Merajver, 11. GCSE. between Oregon State Copper Cyanide Copper Hydroxide Chemical changes: reactions of copper. Harvey, L. J.; McArdle, H. J., Biomarkers of copper status: a brief update. in Liver, Eggs and Excreta Of Laying Hens. and that's how reaction $\eqref{two}$ proceeds. Word equation: Copper (II) Sulfate plus Sodium Hydroxide Copper (II) hydroxide + Sodium sulfate. Calcium, carbon, copper, chromium, cobalt, chlorine, cesium, cadmium. Type of Chemical Reaction: For this reaction we have a double replacement reaction. Concentrations of Copper. You will get a pale blue-green precipitate. Does anyone have an idea of what's going on? If you are mixing the solids, there will be no reaction. The colour change on adding water to anhydrous copper(II) sulfate has been used as a test for the presence of water in a liquid.

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