Sodium chloride solution was electrolysed - Edexcel - GCSE Chemistry - Question 5 - 2012 - Paper 1
Question 5
Sodium chloride solution was electrolysed.
The reaction produced chlorine and hydrogen.
The remaining solution contained sodium hydroxide, NaOH.
(i) State a hazard ... show full transcript
Worked Solution & Example Answer:Sodium chloride solution was electrolysed - Edexcel - GCSE Chemistry - Question 5 - 2012 - Paper 1
Step 1
State a hazard associated with chlorine gas.
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Answer
Chlorine gas is toxic or poisonous, posing serious health risks if inhaled.
Step 2
Describe a test that can be used to identify a sample of gas as chlorine.
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Answer
To test for chlorine gas, use damp blue litmus paper. If chlorine is present, the litmus paper will turn white, indicating the gas's bleaching effect.
Step 3
State a use of chlorine.
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Answer
Chlorine is used for disinfecting water, making it safe for drinking and swimming pool sanitation.
Step 4
Complete and balance the equation for the overall reaction taking place when sodium chloride solution is electrolysed.
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