What is the formula of Copper Sulfate?
Correct answer: D. CuSO4.5H2O
- A. CuSO3.4H2O
- B. CuSO4.4H2O
- C. CuSO3.5H2O
- D. CuSO4.5H2O
Explanation
The common crystalline form called copper sulfate is CuSO4.5H2O, containing five water molecules of crystallisation and appearing blue. The likely distractor is CuSO4.4H2O, which has the wrong number of water molecules and is not the usual hydrated form tested here.
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About Reactions of Group II Elements
Group II reactions cover the behaviour of beryllium, magnesium, calcium, strontium and barium with water, oxygen, halogens, acids and nitrogen. The trends in reactivity, hydroxide solubility and basicity, along with the thermal decomposition of carbonates and nitrates, depend on increasing atomic size down the group.
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