Acids, Alkalis and Salts

Question 1

Name the products of the reaction between zinc and hydrochloric acid.

Answer 1

Zinc chloride and hydrogen

Question 2

What is the formula of sodium sulfate?

Answer 2

Na2SO4

Question 3

Which pair of substances do not react together to make copper sulfate?

Answer 3

Copper carbonate and sulfuric acid

Question 4

In the preparation of zinc chloride crystals from zinc carbonate and hydrochloric acid, why is the mixture filtered after the zinc carbonate has been added to the acid?

Answer 4

To remove excess zinc carbonate

Question 5

What is the formula of the ion produced by acids in aqueous solution?

Answer 5

H+

Question 6

In the preparation of a salt, why is the saturated solution of the salt left in a warm, dry place for a few days rather than heated over a water bath?

Answer 6

To allow large crystals to form

Question 7

What is the best definition of a weak acid?- Higher

Answer 7

An acid which is only partially ionised in aqueous solution

Question 8

A acid of concentration 1 mol dm3 has a pH of 2.0. The acid is diluted to a concentration of 0.1 mol dm3. What is its new pH? - Higher

Answer 8

3.0