IB Chemistry HL 2.1.1 Chemical equations Question Bank

Practise IB Chemistry HL 2.1.1 by applying chemical equations to exam-style questions.

Exam points

identify the relevant chemical structure, process or evidence
apply the correct chemical model or equation
evaluate the result using chemical reasoning and data

[Maximum number: 1]

Phosphoryl chloride, $\mathrm{POCl}_{3}$ , is a dehydrating agent.

State the balanced chemical equation for the reaction of $\mathrm{PCl}_{3}(1)$ with water.

Figure for Answer to Question 2.1.1—Chemical equations question 1 — IB Chemistry HL

Allow any combination of dots/crosses or lines to represent electron pairs. Do not penalise missing lone pairs on Cl if already penalised in (b)(i).
(ii) trigonal/triangular bipyramidal;

Do not allow ECF from Lewis structures with incorrect number of negative charge centres.
(iii) $120^{\circ}$ and $90^{\circ} / 180^{\circ}$ ;

Ignore other bond angles such as $240^{\circ}$ and $360^{\circ}$ .
Apply list principle if some correct and incorrect angles given.

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2.1.1—Chemical equations question 1