CAIE A-Level Chemistry AS 2.3.1 Ionic Formulas and Oxidation Numbers Questions

Practise writing ionic formulae from charges and oxidation numbers, naming specified ions and checking balanced compositions in chemical compounds.

Exam points

Write ionic formulae from ionic charges and oxidation numbers, including specified common ions.

[Maximum number: 1]

Which pair of formulae is correct?

$\mathrm{Ag}_{2} \mathrm{CO}_{3}$ and $\left(\mathrm{NH}_{4}\right)_{3} \mathrm{NO}_{3}$

$\mathrm{K}_{2} \mathrm{HCO}_{3}$ and $\mathrm{Zn}_{3}\left(\mathrm{PO}_{4}\right)_{2}$

$\mathrm{AgHCO}_{3}$ and $\mathrm{K}_{3} \mathrm{PO}_{4}$

$\mathrm{ZnCO}_{3}$ and $\left(\mathrm{NH}_{4}\right)_{2} \mathrm{PO}_{4}$

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