Chemistry · Oct / Nov 2023 · Paper 61 · Question 4
0620
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The question as text
Greaseaway and Kitchenclean are two solutions used as household cleaners that contain aqueous ammonia. Plan an investigation to find which of the two household cleaners contains aqueous ammonia with the highest concentration. Assume that aqueous ammonia is the only alkali in the cleaners. Include in your plan: ● the method you will use ● how your results will be used to determine which household cleaner contains aqueous ammonia with the highest concentration. You are provided with common laboratory apparatus and chemicals. [6]
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any 6 from:
MP1 known / stated volume of one cleaner
MP2 measured with appropriate named apparatus (pipette / measuring cylinder / burette)
MP3 named indicator used in this experiment
MP4 acid added to cleaner in flask
MP5 correct end-point colour for indicator used stated
MP6 recorded / measured start and end reading on burette
MP7 biggest volume (of acid) used has most concentrated ammonia
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