When conducting an experiment on reactions of metals with water, what must be done before you begin?Group of answer choicesclean the surface with sandpaper to remove oxidesclean the surface with a clothallow them to sit in the test tubes for 30 minutes

You want to see the possible violent reaction between water and a certain piece of metal. Which of the following is the best laboratory tool to use as a container for the water and metal?a.Beakerb.test tubec.Erlenmeyer flaskd.graduated cylinder

Design an experiment that would allow you to separate out a mixture of iron filings, sand and salt.

Aluminium salts are used to clean water entering a water works but must be removed before the water is supplied to homes. What chemical could be added to a sample of the water to check that all the aluminium has been removed?

a) List three safety precautions that should be taken while performing a chemistry experiment in the laboratory.b) Design a simple experiment to demonstrate the process of water purification.

When the experiment is over, how should you clean up your chemicals?Group of answer choicesEmpty the contents of all your test tubes simultaneously down the sink.Empty your test tubes, one at a time, down the drain in the sink.Empty all your test tubes at the same time into the designated waste container.Empty your test tubes, one at a time, into a designated waste container.