This question is about metals and metal compounds. Iron pyrites is an ionic compound. Figure 1 shows a structure for iron pyrites. Determine the formula of iron pyrites. Use Figure 1. An atom of iron is represented as $^{56}_{26}Fe$. Give the number of protons, neutrons and electrons in this atom of iron. Number of protons Number of neutrons Number of electrons Iron is a transition metal. Sodium is a Group 1 metal. Give two differences between the properties of iron and sodium. Nickel is extracted from nickel oxide by reduction with carbon. Explain why carbon can be used to extract nickel from nickel oxide. An equation for the reaction is: $$NiO + C \rightarrow Ni + CO$$ Calculate the percentage atom economy for the reaction to produce nickel. Relative atomic masses (A): C = 12 Ni = 59 Relative formula mass (M_f): $NiO = 75$ Give your answer to 3 significant figures.

GCSE AQA Chemistry The Periodic Table: This question is about metals an

This question is about metals and metal compounds - AQA - GCSE Chemistry - Question 2 - 2018 - Paper 1

Question 2

This question is about metals and metal compounds. Iron pyrites is an ionic compound. Figure 1 shows a structure for iron pyrites. Determine the formula of iron p... show full transcript

Worked Solution & Example Answer:This question is about metals and metal compounds - AQA - GCSE Chemistry - Question 2 - 2018 - Paper 1

Step 1

Determine the formula of iron pyrites.

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Answer

The formula for iron pyrites is $FeS_2$ , indicating that there is one iron atom and two sulfur atoms in the compound.

Step 2

Number of protons

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Answer

The number of protons in the iron atom is 26.

Step 3

Number of neutrons

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The number of neutrons is 30, calculated as follows:

Number of neutrons = Mass number - Atomic number = 56 - 26 = 30.

Step 4

Number of electrons

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The number of electrons in a neutral atom of iron is also 26.

Step 5

Give two differences between the properties of iron and sodium.

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Answer

Iron has a higher melting and boiling point compared to sodium.
Iron is denser than sodium, which affects their physical properties.

Step 6

Explain why carbon can be used to extract nickel from nickel oxide.

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Answer

Carbon can be used to extract nickel because it is more reactive than nickel. It can displace nickel from nickel oxide by removing oxygen, as shown in the reaction:

$NiO + C \rightarrow Ni + CO$

Step 7

Calculate the percentage atom economy for the reaction to produce nickel.

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Answer

To calculate the percentage atom economy:

Total formula mass of reactants = 75 (for $NiO$ ) + 12 (for $C$ ) = 87.
Mass of nickel produced = 59.

Percentage atom economy = ( \frac{59}{87} \times 100 \approx 67.8 % )

Thus, the answer is 67.8%.

This question is about metals and metal compounds - AQA - GCSE Chemistry - Question 2 - 2018 - Paper 1

Worked Solution & Example Answer:This question is about metals and metal compounds - AQA - GCSE Chemistry - Question 2 - 2018 - Paper 1

Determine the formula of iron pyrites.

Number of protons

Number of neutrons

Number of electrons

Give two differences between the properties of iron and sodium.

Explain why carbon can be used to extract nickel from nickel oxide.

Calculate the percentage atom economy for the reaction to produce nickel.

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