Question Constellation Sign up for free AQA · GCSE · Chemistry · Higher
Negative-electrode product in aqueous electrolysis
Name the product formed at the negative electrode when aqueous calcium chloride solution is electrolysed.
Write your answer first. You can study the marking guidance whenever you need it.
Study the marking See what earns credit and compare it with a full-mark answer.
Marking points
- 1 Names hydrogen or H₂.
Full-mark answer
Hydrogen (H₂).
Why this answer loses marks
Calcium forms because positive ions move to the cathode.
Electrode attraction alone does not decide aqueous discharge; apply reduction competition.