IB Chemistry SL 1.5.3 Molar Volume Question Bank

Practise IB Chemistry SL 1.5.3 with questions converting gas volume and amount using molar-volume conditions and units.

Exam points

convert between gas amount and volume using the molar volume stated for the conditions
compare pressure or volume changes using ratios of absolute temperature rather than Celsius
interpret gas-variable graphs while identifying which quantities are held constant

[Maximum number: 1]

Chlorine undergoes many reactions.

2.67 g of manganese(IV) oxide was added to $200.0 \mathrm{~cm}^{3}$ of $2.00 \mathrm{moldm} \mathrm{m}^{-3} \mathrm{HCl}$ .

\mathrm{MnO}_{2}(\mathrm{~s})+4 \mathrm{HCl}(\mathrm{aq}) \rightarrow \mathrm{Cl}_{2}(\mathrm{~g})+2 \mathrm{H}_{2} \mathrm{O}(\mathrm{l})+\mathrm{MnCl}_{2}(\mathrm{aq})

Calculate the volume of chlorine, in $\mathrm{dm}^{3}$ , produced if the reaction is conducted at standard temperature and pressure (STP). Use section 2 of the data booklet.

V(\mathrm{Cl_2})=0.0307\,\mathrm{mol}\times22.7\,\mathrm{dm^3\,mol^{-1}}=0.697\,\mathrm{dm^3}

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1.5.3—Molar volume question 1