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CAIE A-Level Chemistry 9.2.3 Period 3 Oxide–Water Reactions

Practise writing reactions of specified Period 3 oxides with water and predicting the pH of resulting solutions.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • write Na2O and MgO reactions with water to form alkaline hydroxide solutions where applicable
  • write P4O10, SO2 and SO3 reactions with water to form the corresponding acidic products
  • state when Al2O3 or SiO2 does not react with water and predict qualitative solution pH from the product

9.2.3—Reactions/equations: the reactions, if any, question 1

[Maximum number: 1]

The Pauling electronegativity values of elements can be used to predict the chemical properties of compounds.

Use the information in Table 1.1 to answer the following questions.

Table 1.1

Table 1.1

CO2\mathrm{CO}_{2} and SO2\mathrm{SO}_{2} are acidic gases.

Write an equation for the reaction of SO2\mathrm{SO}_{2} with H2O\mathrm{H}_{2} \mathrm{O}.

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