IB Chemistry HL 3.1.5 Metal–non-metal continuum and oxide chemistry Question Bank

Practise IB Chemistry HL 3.1.5 by analysing the continuum from metallic to non-metallic behaviour through oxide and solution chemistry.

Exam points

Analyse how oxide structure and periodic character determine acidic, basic or amphoteric behaviour.
Deduce equations for oxide–water reactions and connect the products to pH or acid deposition.
Evaluate a continuum classification using multiple chemical properties rather than a single trend.

[Maximum number: 3]

Magnesium is a group 2 metal which exists as a number of isotopes and forms many compounds.

(a)

Magnesium burns in air to form a white compound, magnesium oxide. Formulate an equation for the reaction of magnesium oxide with water.

[ 1 ]

$\mathrm{MgO}(s)+\mathrm{H}_{2}\mathrm{O}(l) \rightarrow \mathrm{Mg(OH)}_{2}(s)$

or:
$\mathrm{MgO}(s)+\mathrm{H}_{2}\mathrm{O}(l) \rightarrow \mathrm{Mg}^{2+}(aq)+2\mathrm{OH}^{-}(aq)$

Accept a reversible arrow.

(b)

Describe the trend in acid-base properties of the oxides of period 3, sodium to chlorine.

[ 2 ]

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3.1.5—Metal/non-metal continuum question 1

Question (a)

Question (b)