Displacement reactions as redox reactions

3 marks · Easy

Complete the ionic equation for the reaction between bromine water and sodium iodide solution. Include state symbols.

(a)

Write the products formed in the reaction.

[1 mark]

(b)

Write a balanced ionic equation, including state symbols, for the reaction.

[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) iodine (I2) and bromide ions (Br−) · must show I2 and Br−

(b) 2I−(aq) + Br2(aq) → 2Br−(aq) + I2(aq) · must show balanced equation, state symbols

Show mark scheme and worked solution

Marking points

B1 (a) · 1 mark · Correctly names both products: iodine (I2) and bromide ions (Br−).

B2 (b) · 1 mark · Writes a balanced ionic equation.

B3 (b) · 1 mark · Includes correct state symbols (aq for ions and Br2, I2; accepts (aq) or (l) for Br2 and I2).

Worked solution

a) The products formed are iodine (I2) and bromide ions (Br−).

b) The balanced ionic equation is: