AQA GCSE Trilogy Chemistry Paper 2 Foundation June 2018 question paper 8464/C/2F

Figure 1 represents an atom of sulfur.

Complete Table 1

Sulfur is in Group 6 of the periodic table.

Complete the electronic structure of the sulfur atom represented in Figure 2

Sulfur reacts with oxygen to produce sulfur dioxide.

Complete the word equation for this reaction.

What effect is caused by sulfur dioxide?

Tick one box.

Figure 3 shows the mass of sulfur dioxide in the Earth’s atmosphere between 1984 and 2014

A student said:

‘the mass of sulfur dioxide in the atmosphere decreased every year between 1984 and 2014’

Is the student correct?

Use data from Figure 3 to justify your answer.

Figure 4 shows the percentage of sulfur dioxide released by human activities.

Calculate the percentage of sulfur dioxide released by industry.

A student used paper chromatography to identify the colours in a black ink.

Figure 5 shows the student’s results.

What colours are in the black ink?

Suggest which colour is least soluble in the solvent.

Give a reason for your answer.

Use Figure 5 to complete Table 2

Calculate the R_f value for the green colour.

Use the equation:

A student tested a sea water sample for dissolved solids.

Figure 6 shows the apparatus.

What is apparatus X on Figure 6 ?

Tick one box.

The student did the test four times. The student calculated the mass of solid on apparatus X after heating.

Table 3 shows the student’s results.

Calculate the mean mass of solid.

Do not include the anomalous result in your calculation.

Give your answer to 2 significant figures.

The student distilled a sample of sea water in the apparatus shown in Figure 7

What change of state is happening at the surface of the sea water in Figure 7 ?

Describe how the water in the test tube in Figure 7 is different from the sea water.

Why does producing drinking water from sea water using distillation cost a lot of money?

River water is filtered then sterilised to make drinking water.

Why are these two processes done?

What percentage of the Earth’s atmosphere is nitrogen?

Tick one box.

During the first billion years of the Earth’s existence the amount of nitrogen in the atmosphere increased.

Give one source of this nitrogen.

Nitrogen is used to make ammonia.

The word equation for the reaction is:

Write the correct symbol in the equation to show that it is a reversible reaction.

A reversible reaction can reach equilibrium.

Complete the sentence.

Equilibrium is reached when the forward reaction and the reverse reaction happen at

Fertilisers are formulations containing nitrogen.

What is a formulation?

Table 4 shows percentages of chemical elements in a fertiliser.

Draw the bar for potassium on Figure 8

Use the information in Table 4

A fertiliser contains 0.225 g of iron per 3.0 g of fertiliser.

Which calculation gives the percentage of iron in the fertiliser?

Tick one box.

Figure 9 shows the use of fertiliser in four different countries, A, B, C and D, in 2003 and 2015

A student said:

‘ much more fertiliser was used in 2015 than in 2003’

Is the student correct?

Use data from Figure 9 to justify your answer.

A student investigated the effect of the size of marble chips on the rate of the reaction between marble chips and hydrochloric acid.

This is the method used.

1. Add 10.0 g of marble chips into the flask.

2. Add 50 cm³ of hydrochloric acid and start a timer.

3. Record the mass lost from the flask every 10 seconds.

4. Repeat steps 1 to 3 with different sizes of marble chips.

Figure 10 shows the apparatus.

Draw one line from each type of variable to the correct example of the variable.

The equation for the reaction is:

CaCO₃(s) + 2HCl(aq) CaCl₂(aq) + H₂O(l) + CO₂(g)

Name the three products.

Another student suggests putting some cotton wool in the top of the flask.

Suggest why this improves the investigation.

The reaction produces 1.6 g of gas in 30 seconds.

Calculate the mean rate of the reaction in the first 30 seconds.

Use the equation:

What is the unit for the mean rate of reaction calculated in question 05.4 ?

Tick one box.

Table 5 shows the student’s results.

Plot the data from Table 5 on Figure 11

Draw a line of best fit.

Figure 12 shows a large marble chip and eight small marble chips.

The large marble chip has the same total volume as the eight small marble chips, but a different surface area.

Why do the eight small marble chips react faster than the large marble chip?

Tick one box.

Crude oil is a mixture of hydrocarbons.

The hydrocarbons in crude oil are separated into fractions by fractional distillation.

Figure 13 shows a fractional distillation column.

Crude oil vapour passes up the column.

Complete the sentence.

Choose the answer from the box.

Why do the fractions separate?

Tick one box.

Most of the hydrocarbons in crude oil are alkanes.

Figure 14 represents an alkane molecule.

Name the alkane.

Methane (CH₄) is an alkane.

What is the general formula for alkanes?

Tick one box.

Alkanes burn in oxygen.

Balance the equation for methane burning.

Ethene is an alkene.

Which reagent is used to test for alkenes?

Tick one box.

Table 6 shows data from a life cycle assessment (LCA) for the disposal of 10 000 biodegradable plastic bags.

Why are life cycle assessments (LCA) done?

Compare the two methods for the disposal of biodegradable plastic bags.

Use information from Table 6

This question is about the Earth’s atmosphere.

Carbon dioxide is a greenhouse gas.

What is another greenhouse gas?

Tick one box.

Greenhouse gases cause global climate change.

Give two effects of global climate change.

4.1 kg of a plastic, used to make plastic bottles, has a carbon footprint of 6.0 kg of carbon dioxide.

Calculate the carbon footprint of one plastic bottle of mass 23.5 g

Give one way that carbon dioxide emissions can be reduced when a plastic bottle is manufactured.

Explain how the percentages of nitrogen, oxygen and carbon dioxide in the Earth’s atmosphere today have changed from the Earth’s early atmosphere.