Below are chemical formula of some covalent compounds. Classify them as acids or bases.

Groups:

(a) Acids

,

(b) Bases

• NH₄OH

• H₂SO₄

• HCl

• CH3COOH

• KOH
• HNO₃

• H₃PO₄

• Mg(OH)₂

• NaOH
• Ca(OH)₂

Arrange the following substances in increasing pH (smallest pH to largest pH).

• pure water

• aqueous ammonia

• hydrochloric acid

• aqueous sodium hydroxide

• ethanoic acid

How do you tell how strong an acid is this substance?

• Use red litmus paper

• Use blue litmus paper

• Use Universal Indicator

• Use pH meter

Which of the following will acid not react with?

• metal

• base

• carbonate

• sulfate

When hydrochloric acid reacts with zinc, the salt formed is (a)   and ​ (b)   gas is evolved.

• zinc chloride
• hydrogen
• zinc chlorate
• chloric zincate
• carbon dioxide

What are the products formed when sulfuric acid reacts with sodium hydroxide?

• sodium sulfide

• sodium sulfate

• hydrogen gas

• water

• carbon dioxide

What do you SEE when you add sulfuric acid into aqueous sodium hydroxide?

• effervescence (bubbling in liquid) is observed

• solution turns from red to green

• solution turns from red to purple

• no visible change

​ (a)   acid + ​ (b)   → ​ (c)   + ​ (d)   gas + ​ (e)  

• nitric
• lead(II) carbonate
• lead(II) nitrate
• carbon dioxide
• water
• sulfuric
• lead(II) nitride

Which is the ionic equation of acid and carbonate reaction?

• 2H⁺(aq) + CO₃^2- (aq) → H₂O(l) + CO₂(g)

• H₂(g) + CO₂(g) → H₂O(l)

• H₂O(l) + CO₂(g) → 2H⁺(aq) + CO₃^2- (aq)

• H₂(g) + CO₂(g) → H₂CO_{2 (s)}

Which of the following is the formula of ammonium salt?

• HNO₃

• NaNO₃

• NH₄Cl

• NH₃