Acid and Base (Year 9 Recap)

Match the term with the definition

• Neutral Substance

• damage or destroy other substances through chemical reactions

• Alkali

• A base soluble in water

• Solution

• A feature such as colour, size, weight, texture or hardness

• Property

• form a mixture when dissolved in water

• Corrosive

• Any substance that is neither an acid nor a base

Match the following with the type of substance.

Groups:

(a) Acid

,

(b) Neutral

,

(c) Base

• Soap

• Lemon

• Baking Soda (Sodium bicarbonate)

• Not corrosive

• Tastes sour

• Reacts with metals

• Sugar solution

• Corrosive

• Vinegar

• Called an alkali when dissolved

• Caustic

• Taste bitter

• Salt Water

• Distilled Water

Match the pH with the appropriate description.

• 7

• Weak acid

• 8

• Neutral

• 1

• Strong acid

• 14

• Strong Base

• 6

• Weak Base

Match the pH with the appropriate description.

• 14

• Equal H+ and OH- ions

• 7

• Most OH- ions

• 1

• Most H+ ions

• Acids release ​ (a)   ions in solution. They have the formula ​ (b)   .

• Bases release ​ (c)   ions in solution. They have the formula ​ (d)   .

• hydrogen
• hydroxide
• H+
• OH–

Match the term to the definition.

• salt

• an ionic substance (e.g. NaCl)

• neutralization

• The reaction between an acid and base that forms water and a salt.

• Indicator

• A value that indicates the amount of H+ ions

• pH

• a substance that changes colour in the presence of an acid or a base

• water
• salt
• hydrogen
• carbon dioxide
• oxygen