Acids and Alkalis

Question 1

pH Scale

Answer 1

The scale that tells you how strong an acid or alkali is. 7 is neutral, 0 is the strongest acid, 14 is the strongest alkali.

Question 2

Acid

Answer 2

A substance which produces hydrogen ions in solution. Acids have pH values lower than 7.

Question 3

Alkali

Answer 3

A special type of base which dissolves in water to produce hydroxide ions. Alkalis have pH values higher than 7.

Question 4

Neutralisation

Answer 4

A chemical reaction in which an acid reacts with a base or an alkali to form a salt and water.

Question 5

What are the names of the substances formed in a neutralisation reaction?

Answer 5

Salt and water.

Acid + alkali → salt + water

Question 6

Corrosive

Answer 6

A substance that can burn through another substance

Question 7

Concentrated

Answer 7

Concentrated means when something has less water than the main ingredient

Question 8

Dilute

Answer 8

It is when a liquid has more water in it than the main ingredient

Question 9

Indicator

Answer 9

A substance that can be used to find out if something is acidic or alkaline.

Question 10

A salt made from hydrochloric acid will end in?

Answer 10

Chloride

Question 11

A salt made from nitric acid will end in?

Answer 11

Nitrate

Question 12

A salt made from sulfuric acid will end in?

Answer 12

Sulfate

Question 13

The second word in the name of a salt comes from which of the reactants?

Answer 13

The second word of the name is taken from the name of the acid.

For example:

Hydrochloric acid → chloride

Nitric acid → nitrate

Sulfuric acid → sulfate

Question 14

What name is given to the substances made in a chemical reaction?

Answer 14

Products.

For example, salt and water are the products of a neutralisation reaction.