Acids and alkalis test

1

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

2

What term is given to a reaction which transfers heat energy to the surroundings?

3

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?

4

What is the ion produced by acids in aqueous solution?

5

When barium hydroxide and ammonium chloride react, the temperature of the mixture decreases. What kind of reaction is this?

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?

7

Which of these pH values is the pH of an acidic solution?

8

Which of these substances is a weak acid? - Higher

9

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

10

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