標題:
問CHEM 2002 MC Q.2 AND Q.7
發問:
問CHEM 2001 MC Q.2 AND Q.7 可唔可以解釋下個答案問黎?
最佳解答:
2. The answer is B. The colour of the solution is due to the cation. copper (II) sulphate solution is blue in colour. nickel (II) sulphate is green in colour. cobalt (II) chloride is pink in colour. iron (III) sulphate is brown in colour. 7. The answer is C. For A, the colour changes from yellow to orange. For B, there is no change of oxidation no. in any species. So, C is right. For D, this is not a neutralization as Na2CrO4 is not an alkali. Neutralization refers to the reaction between an acid and an alkali.
問CHEM 2002 MC Q.2 AND Q.7
發問:
問CHEM 2001 MC Q.2 AND Q.7 可唔可以解釋下個答案問黎?
最佳解答:
2. The answer is B. The colour of the solution is due to the cation. copper (II) sulphate solution is blue in colour. nickel (II) sulphate is green in colour. cobalt (II) chloride is pink in colour. iron (III) sulphate is brown in colour. 7. The answer is C. For A, the colour changes from yellow to orange. For B, there is no change of oxidation no. in any species. So, C is right. For D, this is not a neutralization as Na2CrO4 is not an alkali. Neutralization refers to the reaction between an acid and an alkali.
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