Question

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.​

Answer 1

Answer:

Explanation:

According to question-

CuSO4 + NaOH → Cu(OH)2 + NaSO4

(15.95 g) (8 g) (9.75 g) (14.2 g)

Clearly, in this case

Total mass of reactants = (15.95 g + 8 g) = 23.95 g

Total mass of products = (9.75 g + 14.2 g) = 23.95 g

Hence, Law of conservation of mass is valid here.