EXAM CONDITIONS
Your bench has been set out for 0620/52.
Everything on this paper is what the confidential instructions told the technician to put in front of you — the same solutions, the same glassware, labelled exactly as the candidate sees them. You are not told what B, C, D, E or F are. That's the point.
3 tasks · 20 questions · 40 marks
Question 1PRACTICAL
Double-indicator titration
Titrate acidic solution B against two different sodium hydroxide solutions, catching both end-points with two indicators in the same flask.
0/9 answered
Question 2PRACTICAL
Qualitative analysis of two unknown solids
Run the standard test series on solids E and F, record every observation, and name the ions present.
0/10 answered
Question 3WRITTEN ONLY
Planning: comparing alcohols as fuels
Written only — describe how you would investigate which of three alcohols heats water fastest.
0/1 answered