CAIE IGCSE Chemistry 3.1.6 Deduce the Formula of an Ionic Questions

Construct ionic formulae by balancing the charges of cations and anions in each compound.

Exam points

write ionic formulae from ion charges
deduce formulae of ionic compounds
balance total positive and negative charge in formulae
identify formulae of oxides, sulfates, hydroxides and salts
apply ion ratios to unfamiliar ionic compounds

[Maximum number: 1]

This question is about metals.

Zinc oxide neutralises both acids and bases.

When zinc oxide neutralises aqueous sodium hydroxide, sodium zincate is formed.

The formula of the zincate ion is $\mathrm{ZnO}_{2}{ }^{2-}$ .
Deduce the formula of sodium zincate.

$\mathrm{Na}_{2} \mathrm{ZnO}_{2}$

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CAIE IGCSE Chemistry 3.1.6 Deduce the Formula of an Ionic Questions question 1