Testing for chlorides (Cl^-), bromides (Br^-) and iodides (I^-)

4 marks · Normal

The table shows the results of silver nitrate tests on four unknown solutions after they were all acidified with dilute nitric acid.

Solution	Observation with AgNO3 after acidifying
P	White precipitate
Q	Yellow precipitate
R	No precipitate
S	Cream precipitate

For each solution, write the name and formula of the ion responsible for the observation. If there is no precipitate, state 'none'.

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 mark scheme and worked solution

Marking points

A1 · 1 mark · P: chloride ion (Cl^-)

A2 · 1 mark · Q: iodide ion (I^-)

A3 · 1 mark · R: none

A4 · 1 mark · S: bromide ion (Br^-)

Worked solution