Question

Question 1) Copper sulphate reacts with sodium hydroxide to form a blue precipitate of copper hydroxide and sodium sulphate. 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. Which law of chemical combination is illustrated by this data ? Give reason for your choice.

Question 2) Potassium chlorate decomposes, on heating, to form potassium chloride and oxygen. When 24.5 g of potassium chlorate is decomposed completely, then 14.9 g of potassium chloride is formed. Calculate the mass of oxygen formed. Which law of chemical combination have you used in solving this problem?​

Answer 1

Answer:

For question 1 ,the answer is Double Decomposition Reaction.because copper sulphate is displaced to copper hydroxide and sodium hydroxide is displaced to sodium sulphate.

For question 2,the answer is

$24.5 - 14.9 = 9.6$

Decomposition Reaction

Answer 2

Answer:

1. The answer is Double Decomposition Reaction.because copper sulphate is displaced to copper hydroxide and sodium hydroxide is displaced to sodium sulphate.
2. The answer is

24.5 - 14.9 =9.6

Decomposition Reaction