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CAIE A-Level Chemistry 9.2.4 Period 3 Oxide and Hydroxide Acid–Base Behaviour

Practise classifying Period 3 oxides and hydroxides as basic, acidic or amphoteric and writing their reactions.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • classify Na2O and MgO as basic, the non-metal oxides as acidic and aluminium compounds as amphoteric
  • define amphoteric as reacting with both acids and bases and identify Al2O3 or Al(OH)3
  • write balanced equations with acids and with NaOH, including the correct aluminium-containing product

9.2.4—Reactions/equations: the acid / base behaviour 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 NaOH .

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