For Examiners Use - Materials For this paper you must have: • the...

*Jun25 7404101* IB/M/Jun25/G4002/V6 7404/1

For Examiner’s Use Question Mark 1 2 3 4 5 6 7 Section B TOTAL

Tuesday 13 May 2025 Morning Time allowed: 1 hour 30 minutes

Materials

For this paper you must have:

• the Periodic Table/Data Sheet, provided as an insert (enclosed) • a ruler with millimetre measurements • a scientific calculator, which you are expected to use where appropriate.

Instructions • Use black ink or black ball-point pen.• Fill in the boxes at the top of this page.• Answer all questions.• You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages.• If you need extra space for your answer(s), use the lined pages at the end of this book. Write the question number against your answer(s).• All working must be shown.• Do all rough work in this book. Cross through any work you do not want to be marked.

Information • The marks for questions are shown in brackets.• The maximum mark for this paper is 80.

Advice • You are advised to spend 65 minutes on Section A and 25 minutes on Section B.Please write clearly in block capitals.Centre number

Candidate number

Surname

Forename(s)

Candidate signature

I declare this is my own work.

AS

CHEMISTRY

Paper 1 Inorganic and Physical Chemistry 1 / 3

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*02*

IB/M/Jun25/7404/1

Do not write outside the box Section A

Answer all questions in this section.

• 1

This question is about the extraction of titanium.

The first stage in the extraction of titanium is the formation of titanium(IV) chloride, TiCl4

TiO2(s) + 2 C(s) + 2 Cl2(g) ⟶ TiCl4(l) + 2 CO(g)

• 1

. 1 Calculate the percentage atom economy to form TiCl4 in this first stage of the extraction.[2 marks]

Percentage atom economy

• 1

. 2 Suggest one economic advantage of using a process with a high percentage atom economy.[1 mark]

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3

*03* Turn over ►

IB/M/Jun25/7404/1

Do not write outside the box

6

The second stage of the extraction is the reaction between TiCl4 and magnesium.

• 1

. 3 Give the equation for the reaction between TiCl4 and magnesium.

State the role of magnesium in this reaction.[2 marks]

Equation

Role of magnesium

• 1

. 4 Titanium is an expensive metal because its extraction process uses magnesium.

Suggest why magnesium is expensive.[1 mark]

Turn over for the next question

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