Acids, Bases and Salt Preparations

5 marks · Easy

This question is about the reactions of acids with different substances.

(a)

State the general word equation for the reaction between a metal and an acid.

[1 mark]

(b)

Write a balanced symbol equation for the reaction between magnesium and dilute sulfuric acid.

[1 mark]

(c)

State the general word equation for the reaction between a metal oxide and an acid.

[1 mark]

(d)

Name the salt and the other product formed when copper(II) oxide reacts with dilute hydrochloric acid.

[2 marks]

Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.

Show answer

(a) metal + acid → salt + hydrogen · must show all reactants and products named in general way

(b) Mg(s) + H2SO4(aq) → MgSO4(aq) + H2(g) · must show balanced equation; correct state symbols

(d) copper(II) chloride and water · must show correct name for salt (copper(II) chloride) and water

Show mark scheme and worked solution

Marking points

B1 (a) · 1 mark · States correct general word equation for metal + acid: metal + acid → salt + hydrogen.

B2 (b) · 1 mark · Writes correct balanced symbol equation with correct state symbols for magnesium with sulfuric acid: Mg(s) + H2SO4(aq) → MgSO4(aq) + H2(g)

B3 (c) · 1 mark · States correct general word equation for metal oxide + acid: metal oxide + acid → salt + water.

B4 (d) · 1 mark · Names the correct salt: copper(II) chloride.

B5 (d) · 1 mark · Identifies water as the other product.

Worked solution

a) The general word equation for the reaction between a metal and an acid is:

b) The balanced symbol equation for the reaction between magnesium and dilute sulfuric acid is:

c) The general word equation for the reaction between a metal oxide and an acid is:

d) Copper(II) oxide reacts with dilute hydrochloric acid to form copper(II) chloride and water.