Question | Answer |
What is the element collected at the negative electrode during electrolysis of water? | Hydrogen |
What are the products of electrolysis of Brine | Chlorine and Hydrogen and Sodium Hydroxide |
Describe the test to show that a gas is Chlorine | Blue Litmus paper turns red then white |
What is the definition of electrolysis? | The breaking down of compound into its element using an electric current |
Describe the test to show that a gas is Oxygen | A glowing splint will relight |
What is the compound of Oxygen and Hydrogen? | Water |
What is the element collected at the negative electrode during electrolysis of brine? | Hydrogen |
What is the element collected at the positive electrode during electrolysis of brine? | Chlorine |
What are the products of electrolysis of acidified water | Hydrogen and Oxygen |
Describe how you would carry out an electrolysis of water experiment | connect two electrodes to a power pack/battery; Place the electrodes in a beaker of water; place two test-tube full of water above the electrodes; switch on the current and collect the gases in the test-tubes |
What are the products of electrolysis of HydroChloric Acid | Hydrogen and Chlorine |
Describe the test to show that a gas is Hydrogen | Place a splint in the test-tube and there will be a pop |
What is the formula of Oxygen gas? | O2 |
What is the formula of Hydrogen gas? | H2 |
What is the formula of Chlorine gas? | Cl2 |
Write the balanced equation for the electrolysis of Water into Hydrogen and Oxygen | 2 H2O --> 2 H2 + O2 |
What safety precaution should youtake when testing for Chlorine Gas. Why? | Well ventilated room with a draught or a fume cupboard. Chlorine is toxic |
What is Chlorine gas used for? | Making PVC plastics |