AQA A LEVEL CHEMISTRY PAPER 2 QUESTION PAPER 2023 (7405/2: Organic and Physical Chemistry)

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AQA A LEVEL CHEMISTRY PAPER 2 QUESTION PAPER 2023 (7405/2: Organic and Physical Chemistry). DOWNLOAD OFFICIAL AND VERIFIED AQA A LEVEL CHEMISTRY PAPER 2 QUESTION PAPER 2023 ON www.leakedexams.com.

0 1 This question is about rates of reaction.
Figure 1 shows apparatus used to measure the rate of reaction when an acid reacts
with an excess of solid sodium hydrogencarbonate, NaHCO3
When different monoprotic organic acids are used, the rates at which gas escapes
can be used to compare the strengths of the acids.
A timer is started when the NaHCO3 is added to the acid and
the mass of CO2 gas lost is recorded at regular intervals.
(It is assumed that any change in mass is due to the loss of CO2)
Figure 1
0 1 . 1 Suggest a reason why using a conical flask instead of a beaker would give more
accurate results in this experiment.
[1 mark]

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Author	OCR KING
Published	30 Jul 2024
Included files	PDF
7405 7405/2 AQA A LEVEL CHEMISTRY PAPER 2 QUESTION PAPER 2023 AQA A LEVEL CHEMISTRY PAPER 2 AQA A LEVEL CHEMISTRY PAPER 2 2023 AQA A LEVEL CHEMISTRY PAPER 2 AQA AQA CHEMISTRY 2023 AQA CHEMISTRY CHEMISTRY 2023 CHEMISTRY