When molten sodium chloride is electrolysed, the products are sodium and chlorine - Edexcel - GCSE Chemistry - Question 4 - 2014 - Paper 1
Question 4
When molten sodium chloride is electrolysed, the products are sodium and chlorine.
(i) Give the formula of sodium chloride.
(ii) State why molten sodium is used in... show full transcript
Worked Solution & Example Answer:When molten sodium chloride is electrolysed, the products are sodium and chlorine - Edexcel - GCSE Chemistry - Question 4 - 2014 - Paper 1
Step 1
Give the formula of sodium chloride.
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Answer
The formula of sodium chloride is NaCl.
Step 2
State why molten sodium is used in some nuclear reactors.
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Answer
Molten sodium is used in some nuclear reactors because it acts as an efficient coolant and helps transfer heat generated from fission reactions.
Step 3
Complete the sentence describing the type of reaction.
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Answer
The type of reactions in which metal ions gain electrons is called reduction.
Step 4
Complete the sentence by putting a cross (X) in the box next to your answer.
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Answer
The correct option is A: ions can only move freely in molten lead bromide.
Step 5
Complete the word equation by showing the products formed when molten lead bromide is electrolysed.
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Answer
The word equation is: lead bromide → lead + bromine.
