Figure 11 shows the apparatus that can be used to electrolyse sodium sulfate solution using inert electrodes - Edexcel - GCSE Chemistry - Question 8 - 2020 - Paper 1
Question 8
Figure 11 shows the apparatus that can be used to electrolyse sodium sulfate solution using inert electrodes.
(a) Hydrogen is produced at the negative electrode dur... show full transcript
Worked Solution & Example Answer:Figure 11 shows the apparatus that can be used to electrolyse sodium sulfate solution using inert electrodes - Edexcel - GCSE Chemistry - Question 8 - 2020 - Paper 1
Step 1
(i) Describe the test to show the gas is hydrogen.
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Answer
To test for hydrogen gas, you can take a lighted splint and carefully bring it close to the gas. If the gas is hydrogen, it will produce a 'pop' sound as it ignites, indicating its presence.
Step 2
(ii) 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 B oxygen.
Step 3
(iii) State what is meant by the term electrolysis.
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Electrolysis is a chemical process that uses an electric current to induce a chemical reaction, typically the decomposition of a compound, by driving ions in a solution or molten state towards electrodes.
