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Across 2. Type of reaction where hydrogen reacts with oxygen 7. This gas bleaches litmus paper 8. This is made when carbon dioxide is bubbled through limewater to make it turn cloudy 9. The catalyst needed to break down hydrogen peroxide 11. ______________ + acid makes a salt + hydrogen gas 14. Made when hydrogen peroxide breaks down 15. End of the name of salts made with nitric acid 16. Tested with a glowing splint which it relights 17. End of the name of salts made with sulfuric acid

Down 1. Tested with a lit splint which then goes 'pop' 2. This is made when excess carbon dioxide is added to limewater- it is soluble 3. Sodium ______________needs to be added to hydrochloric acid to make carbon dioxide 4. Has the formula H2O2 5. A positive result when using bromine water to test for a key functional group 6. Name of the salt made with zinc and hydrochloric acid 7. Chemical name for limewater 10. Tested for with bromine water 12. Used to test for carbon dioxide gas 13. Anhydrous copper sulfate is used to test for the presence of this substance.