IB Chemistry HL 2.1.1 Chemical Equations Questions

Use real HL exam questions to write balanced equations, choose products and verify atom conservation for the stated reaction.

Exam points

Write and balance chemical equations for named reactions with correct molecular formulas, stoichiometric coefficients and state symbols.
Use reaction context to select the appropriate products and coefficients, including ionic equations where the stated transformation requires them.
Check atom conservation and distinguish the equation for the stated chemical transformation from a related but different process.

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Study 2.1.1—Chemical equations conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

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

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

$\mathrm{PCl}_{3}(\mathrm{l})+3\mathrm{H}_{2}\mathrm{O}(\mathrm{l}) \rightarrow \mathrm{H}_{3}\mathrm{PO}_{3}(\mathrm{aq})+3\mathrm{HCl}(\mathrm{aq})$ ;

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IB Chemistry HL 2.1.1 Chemical Equations Questions question 1