Chapter 13 Acids and Bases

Question 1

Examples of acids

Answer 1

1. Citric Acid
2. Carbonic Acid
3. Hydrochloric Acid
4. Sulfuric Acid

Question 2

Examples of Bases

Answer 2

1. Sodium Carbonate
2. Sodium Hydroxide
3. Calcium Carbonate
4. Limewater

Question 3

Alkali

Answer 3

A base that is soluble in water.

Question 4

Concentrated and Dilute

Answer 4

Concentrated solutions contain a large amount of acid or alkali particles.
Dilute solutions contain very few particles of acid or alkali.

Question 5

pH Scale

Answer 5

Used to record how concentrated an acid or alkaline solution is.
A substance that has a pH of 7 is neutral.
A substance that has a pH below 7 is acidic.
A substance that has a pH above 7 is alkaline.

Question 6

Indicator

Answer 6

A substance that shows whether the solution being tested is an acid or base.
An acid will turn blue litmus red.
A base will turn red litmus blue.

Question 7

Neutralisation Reaction

Answer 7

When an acid and a base react to produce salt and water.

Question 8

Acid + Carbonate =

Answer 8

Salt + Water + Carbon Dioxide

Question 9

Titration

Answer 9

A laboratory technique that is used to find the exact volume of acid needed to neutralise a base.

Question 10

Everyday Neutalisation Reactions (2)

Answer 10

Agriculture: Spreading powdered limestone (calcium carbonate) on acidic soil to raise its pH.
Treating Indigestion (too much hydrochloric acid in the stomach): Remedies like Milk of Magnesia contain a base to neutralise the acid.

Question 11

Acid + Metal =

Answer 11

Salt + Hydrogen Gas