Name a reagent you could use to show that sulphate ions were present in a solution. State the observation you would make if the test was positive and identify the substance responsible for this observation.

Name a reagent you could use to show that chloride ions are present in a solution. State the observation you would make if the test was positive. Identify the substance responsible for this observation.

State the trend in the solubility of the silver halides in ammonia going down group 7. Hence describe a test to distinguish between AgCl, AgBr and AgI.

Name a reagent you could use to show that bromide ions are present in a solution. State the observation you would make if the test was positive. Identify the substance responsible for this observation.

Name a reagent you could use to show that iodide ions are present in a solution. State the observation you would make if this test was positive. Identify the substance responsible for this observation.

Suggest why it is not possible to use acidified silver nitrate to show that fluoride ions are present in a solution in the way it is used to test for other halides.

Name a reagent you could use to distinguish between an aldehyde and a ketone.
State the observation you would make with an aldehyde and the observation you would make with a ketone.

State five observations you might make during the reactions between solid sodium iodide and concentrated sulfuric acid. In each case, identify the substance responsible.

State two observations you would make when solid sodium bromide is reacted with concentrated sulfuric acid. In each case, identify the substance responsible.

State one observation you would make when solid sodium chloride reacts with concentrated sulfuric acid. Identify the substance responsible.

State the observation you would make when chlorine is reacted with sodium bromide. Identify the substance responsible.

State the observation you would make when chlorine is reacted with sodium iodide. Identify the substance responsible.

Describe how you could test for chlorine gas.

Name a reagent you could use to show that an organic molecule contains a double bond.
State the observation you would make if the test was positive.