Figure 1 shows the apparatus that can be used to electrolyse sodium sulfate solution using inert electrodes - Edexcel - GCSE Chemistry Combined Science - Question 1 - 2020 - Paper 1
Question 1
Figure 1 shows the apparatus that can be used to electrolyse sodium sulfate solution using inert electrodes.
(a) Hydrogen is produced at the negative electrode duri... show full transcript
Worked Solution & Example Answer:Figure 1 shows the apparatus that can be used to electrolyse sodium sulfate solution using inert electrodes - Edexcel - GCSE Chemistry Combined Science - Question 1 - 2020 - Paper 1
Step 1
Describe the test to show the gas is hydrogen.
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Answer
To test for hydrogen gas, you can use a lit splint. First, take a glowing splint and bring it close to the gas being produced. If the gas is hydrogen, it will ignite with a 'pop' sound, confirming its presence.
Step 2
What is the name of gas X that forms at the positive electrode?
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The name of gas X that forms at the positive electrode is oxygen.
Step 3
State what is meant by the term electrolysis.
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Electrolysis is the process of using electric current to drive a chemical reaction, usually to separate substances, such as splitting water into hydrogen and oxygen, or to deposit a metal from its ore.
