Heat of Neutralisation

Products of a neutralisation reaction are always

• an acid and a base

• an acid and a salt

• salt and water

• salt and base

What sort of reaction happens when an acid and an alkali are mixed?

• Neutralisation

• Combination

• Acidifying

• Displacement

What are the products of the following reaction?
H₂SO₄  +  KOH  -->  

• HK  +  HSO₄
• H₂O  +  KSO₄
• H₂O  +  K₂SO₄
• H₂  +  K₂SO₄

Tags

NGSS.HS-PS1-2

Neutralisation reactions

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

The formulae of the salt formed when sulfuric acid reacts with aluminium hydroxide is...

• Al₂(SO₄)₃

• Al₃(SO₄)₂

• AlSO₄

• Al₂SO₄

Which of the following neutralisation reactions releases the least heat?

• 1 mol of HCl (aq) + 1 mol NH₃(aq)

• 1 mol of CH₃COOH (aq) + 1 mol of NH₃(aq)

• 1 mol of CH₃COOH + 1 mol of KOH(aq)

• 1 mol of HCl(aq) + 1 mol of NaOH(aq)

When 40 cm³ of 0.1 mol dm^-3 hydrocloric acid is mixed with 10 cm³ of 0.1 mol dm-3 sodium hydroxide solution, the rise in temperature is t⁰C. What is the rise temperature when 20 cm³ of 0.1 mol dm^-3 hydrochloric acid reacts with 30 cm³ of 0.1 mol dm^-3 sodium hydroxide solution?

• 1/2 t⁰C

• t⁰C

• 2t⁰C

• 4t⁰C

When 50 cm³ of 1.5 mol dm^-3 HCl is added to 100 cm³ of 1.5 mol dm^-3 sodium hydroxide solution, x kJ of heat is produced. When 45 cm³ of sulphuric acid is added to 100 cm³ 1.5 mol dm^-3 sodium hydroxide, the same amount of heat is produced. What is the concerntration of sulphuric acid?

• 0.2 mol dm^-3

• 0.4 mol dm^-3

• 0.8 mol dm^-3

• 1.5 mol dm^-3

The heat of neutralisation between hydrocloric acid and sodium hydroxide is -57 kJ mol^-1. What is the heat energy released, when 500 cm³ 0f 2.0 mol dm^-3 sulphuric acid reacts with excess potassium hydroxide.

• -0.5 x 57 kJ

• -57 kJ

• -2 x 57 kJ

• -4 x 57 kJ

Which are the following pairs of acid and alkali will produce the lowest temperature change when mixed together? (All the acids and alkalies have the same concerntration of 1.0 mol dm^-3)

• 100 cm³ of HCl and 25 cm³ of NaOH

• 200 cm³ of HCl and 25 cm³ of NaOH

• 100 cm³ of CH₃COOH and 25 cm³ of NaOH

• 200 cm³ of CH₃COOH and 25 cm³ of NaOH