AQA GCSE COMBINED SCIENCE TRILOGY HIGHER TIER PHYSICS PAPER 2H FINAL SCRIPT COMPLETE QUESTIONS AND CORRECT ANSWERS VERIFIED PASS

AQA GCSE COMBINED SCIENCE TRILOGY
HIGHER TIER PHYSICS PAPER 2H FINAL
SCRIPT COMPLETE QUESTIONS AND
CORRECT ANSWERS VERIFIED PASS

●● Describe a test for pure water
Give the result of the test if the water is pure.
Answer: Test - Boil
Result - pure water will boil at 100°C.


●● Describe a method to determine the mass of dissolved solids in a
100cm3 sample of river water.
Answer: Weigh a container using a balance


Measure 100cm3 of water into the container


Heat the water until it has all evaporated


Take away the mass of the empty container, this is the mass of dissolved
solids in the river water.


●● A sample of river water contains 125mg per dm3 of dissolved solids.

, Calculate the mass of dissolved solids in grams in 250cm3 of this
sample of river water.
Give your answer to 2 significant figures.
Answer: Cm3 into dm3 = 250/1000= 0.25dm3


Answer is in g convert mg into g = 125/1000= 0.125g


This means there is 0.125g of solids in 0.25dm3


Need to know how much is in 1dm3


0.25dm3 is 1/4 of 1dm3


0.125/4 = 0.03125


0.031g (2S.F)


●● A water company allows a maximum of 500mg per dm3 of sulfate
ions in drinking water.
A sample of drinking water contains 44mg per dm3 of sulfate ions.
Calculate the percentage (%) of the maximum allowed mass of sulfate
ions in the sample of drinking water.
Answer: 44/500 x 100 = 8.8%