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16 Yuri investigates how much salt dissolves in water.
He predicts that the hotter the water, the more salt will dissolve.
Here are his results.
temperature of water mass of salt dissolved
in °C in ….
10 27
20 29
30 31
40 33
50 35
60 37
(a) Yuri forgets to put the unit for mass in the table.
What is the unit for mass?
[1]
3
(b) Yuri uses 100 cm of water for each temperature of water.
Explain why.
[1]
(c) Yuri’s friend suggests he repeat the experiment.
Why is this a sensible suggestion?
[1]
© UCLES 2019 0846/01/O/N/19
