Acids, alkalis and neutralisation

Identify the correct formulae for the three common lab acids

• H₂SO₄, HNO₂, HCl

• HCl, HNO₃, H₂SO₃

• H₂SO₄, HCl, HNO₃

• HNO₃, HCl₂, H₂SO₄

Which of the following is incorrect?

• acid + metal carbonate -> salt + carbon dioxide + water

• acid + alkali -> salt + water

• acid + metal -> salt + water

• acid + base -> salt +water

An acid is a...

• proton donor

• electron donor

• electron acceptor

• proton acceptor

Select the chemical for X in the following equation:

2 HCl + X -> H₂O + CuCl₂

• Cu(OH)₂

• CuCO₃

• CuO

• Cu

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

• Al₂(SO₄)₃

• Al₃(SO₄)₂

• AlSO₄

• Al₂SO₄

The best description of a salt is...

• Substance formed on neutralisation

• Formed when the hydrogen of an acid is replaced by a metal or ammonium ion

• Formed when the hydrogen of an acid is replaced by a metal or NH₄

• Formed when an acid reacts with an alkali

Washing soda is the salt Na₂CO₃.10H₂O. What does the 10 H₂O tell us?

• Shows the salt is in solution

• Shows water is produced when the salt is formed

• Shows the salt is anhydrous

• Shows there is water of crystallisation

What would you see if calcium metal was added to excess hydrochloric acid?

• Effervescence

• Effervescence and calcium dissolving

• Calcium dissolving

• Effervescence and a colour change

6.00 g of hydrated copper(II) chloride was heated to remove the water. After heating, 4.83 g of the anhydrous salt remained. Calculate the water of crystallisation.

• CuCl₂.H₂O

• CuCl₂.8H₂O

• CuCl₂.2H₂O

• CuCl₂.5H₂O

Which of these reactants is the best combination to use to make zinc nitrate?

• nitric acid + zinc hydroxide

• nitric acid + zinc sulfate

• zinc oxide + nitrous acid

• zinc chloride + nitric acid