Electrolysis occurs when solutions of some compounds are decomposed by passing direct electric current through them - Edexcel - GCSE Chemistry - Question 5 - 2012 - Paper 1
Question 5
Electrolysis occurs when solutions of some compounds are decomposed by passing direct electric current through them.
(a) Sodium chloride solution was electrolysed.
... show full transcript
Worked Solution & Example Answer:Electrolysis occurs when solutions of some compounds are decomposed by passing direct electric current through them - Edexcel - GCSE Chemistry - Question 5 - 2012 - Paper 1
Step 1
State a hazard associated with chlorine gas.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Chlorine gas is toxic and can be harmful or poisonous, causing respiratory issues and irritation when inhaled.
Step 2
Describe a test that can be used to identify a sample of gas as chlorine.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
To identify chlorine gas, you can use damp blue litmus paper. Chlorine will turn the litmus paper white, indicating its presence.
Step 3
State a use of chlorine.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Chlorine is commonly used for disinfecting water, making it suitable for swimming pools and purifying drinking water.
Step 4
Complete and balance the equation for the overall reaction taking place when sodium chloride solution is electrolysed.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
