GCSE Combined Science: Trilogy - Higher Tier Chemistry Paper 2H - 2019-06-12

Sep 5, 2026

Chemistry Paper 2H (Higher Tier) from the GCSE Combined Science Trilogy assesses topics including drinking water quality, dissolved solids calculations, and limits on sulfate ions. It also examines atmospheric pollutants from fuels via nitrogen oxides production in car engines. Students evaluate carbon footprints using provided tables for different cars and apply chromatography concepts to analyse and identify food colouring dyes. The paper includes structured mark allocations and calculation requirements with clear working.

LanguageEnglish

CategoryExam

FormatPDF

Pages20

Reading Time50 min

AccessFree to download

Water quality and dissolved solids

Safe drinking water and purity testing

Mass of dissolved solids calculations

Sulfate ion limits and percentage calculation

Atmospheric pollutants from fuels

Oxides of nitrogen production in car engines

Carbon footprint evaluation

Using Table 1 to compare cars

Chromatography of food colouring

Formulations and dye separation

Chromatograms with multiple dyes

Identifying unknown dyes

| Please write clearly in block capitals. | | | | | --- | --- | --- | --- | | Centre number | | Candidate number | | | Surname
Forename(s)
Candidate signature | | | | GCSE COMBINED SCIENCE: TRILOGY Higher Tier Chemistry Paper 2H H Wednesday 12 June 2019 Morning Time allowed: 1 hour 15 minutes Materials For this paper you must have: • a ruler • a scientific calculator • the periodic table (enclosed) . Instructions • Use black ink or black ball-point pen. • Fill in the boxes at the top of this page. • Answer all questions in the spaces provided. • Do all rough work in this book. Cross through any work you do not want to be marked. • In all calculations, show clearly how you work out your answer. Information | For Examiner’s Use | | | --- | --- | | Question | Mark | | 1 | | | 2 | | | 3 | | | 4 | | | 5 | | | 6 | | | 7 | | | TOTAL | | • The maximum mark for this paper is 70. • The marks for questions are shown in brackets. • You are expected to use a calculator where appropriate. • You are reminded of the need for good English and clear presentation in your answers. 0 1 Water that is safe to drink contains dissolved substances. 0 1 . 1 What do we call water that is safe to drink? Tick ( 􀀹 ) one box. Desalinated Filtered Fresh Potable [1 mark] 0 1 . 2 Describe a test for pure water. Give the result of the test if the water is pure. [2 marks] Test Result Do not write outside the box 0 1 . 3 Describe a method to determine the mass of dissolved solids in a 100 cm3 sample of river water. [4 marks] | | | --- | | | | | | | | | | | | | | | | | | | 0 1 . 4 A sample of river water contains 125 mg per dm3 of dissolved solids. Calculate the mass of dissolved solids in grams in 250 cm3 of this sample of river water. Give your answer to 2 significant figures. [4 marks] Mass of dissolved solids = g outside the box | | | | | | A water company allows a maximum of 500 mg per dm3 of sulfate ions in drinking water.
A sample of drinking water contains 44 mg per dm3 of sulfate ions.
Calculate the percentage (%) of the maximum allowed mass of sulfate ions in the sample of drinking water.
[2 marks]

Percentage (%) of the maximum allowed mass = % | outside box | | | --- | --- | --- | --- | --- | --- | --- | --- | | | 0 | 1 | . | 5 | | | | | | | | | | | | | | | | | | | | | 13 | | | | | | | | | | the 0 2 This question is about atmospheric pollutants from fuels. 0 2 . 1 Fuel burns in a car engine. Describe how oxides of nitrogen are produced in a car engine. [2 marks] | | | --- | | | | | Question 2 continues on the next page outside the box | 0 2 . 2 Table 1 shows the carbon footprint during the manufacture and use of three cars.
Table 1
Car Mass of CO2 produced during manufacture in kg Mass of CO2
produced when driving in kg per km Total mass of CO2
produced from manufacture and 40 000 km driving in kg Total mass of CO2
produced from manufacture and 100 000 km driving in kg Car A 14 000 0.123 18 920 26 300 Car B 20 000 0.085 23 400 28 500 Car C 23 000 0.044 24 760 27 400
Evaluate the carbon footprint of the cars.
Use information from Table 1.
[6 marks]
| outside box | | | --- | --- | --- | | | | 8 | the 0 3 This question is about chromatography of food colouring. 0 3 . 1 Food colouring is a formulation. What is a formulation? [1 mark] 0 3 . 2 Explain how paper chromatography separates the dyes in a food colouring. Do not give details of how to do the experiment. [2 marks] | | | --- | | | | | 0 3 . 3 Explain how the student could tell from the chromatogram that the food colouring contained more than one dye. [2 marks] | | | --- | | | | | Question 3 continues on the next page outside the box | | | | | | Explain how the student could use chromatogr

FAQs

Which science topics are assessed besides water and calculations?

The paper also covers production of nitrogen oxides in car engines, evaluation of carbon footprints from a data table, and chromatography to explain dye separation and identify unknown dyes in food colouring.

Sep 5, 2026

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