C3 - Tests For Negative Ions

Question 1

What will happen if the CO2 test is positive?

Answer 1

The limewater will turn cloudy.

Question 2

How do you test for carbonate ions?

Answer 2

React with dilute acid & see if CO2 is produced.

Question 3

What is the reaction for a carbonate & an acid?

Answer 3

Acid + carbonate -> salt + water + CO2

Question 4

What is the test for halide ions?

Answer 4

Add dilute nitric acid then silver nitrate solution.

Question 5

What precipitate do chlorine ions form?

Answer 5

White precipitate of silver chloride.

Question 6

What precipitate do bromide ions form?

Answer 6

Cream precipitate of silver bromide.

Question 7

What precipitate do iodide ions form?

Answer 7

A yellow precipitate of silver iodide.

Question 8

What is the test for CO2?

Answer 8

Bubbling a gas through limewater.