Chemical reactions - Decomposition reactions
3 important questions on Chemical reactions - Decomposition reactions
How does a Hofmann voltameter work
It places two electrodes in acidified water, they connect the voltage source to the water. One electrode is connected via a wire to the positive pole and the other to the negative pole
At which poles are oxygen and hydrogen produced
Oxygen is produced at the positive electrode, and hydrogen is produced at the negative electrode
How do you identify the reaction products the electrolysis of water
1. You collect the hydrogen gas in a test tube. When you hold a burning match at the mouth of the test tube, you hear a pop
2. Oxygen can be identified with a glowing wood splint. Putting it in the collected oxygen will cause it to burn more brightly
2. Oxygen can be identified with a glowing wood splint. Putting it in the collected oxygen will cause it to burn more brightly
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