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IB Chemistry HL 1.4.6 Avogadro’s Law Question Bank

Practise IB Chemistry HL 1.4.6 with SL and HL questions linking gas volume, amount and particle number under Avogadro’s law.

Syllabus
First assessment 2025
Course
Chemistry HL
Level
HL

1.4.6—Avogadro's law question 1

[Maximum number: 1]

Phosphine (IUPAC name phosphane) is a hydride of phosphorus, with the formula PH3\mathrm{PH}_{3}.

2.478 g of white phosphorus was used to make phosphine according to the equation:

P4( s)+3OH−(aq)+3H2O(l)→PH3( g)+3H2PO2−(aq)\mathrm{P}_{4}(\mathrm{~s})+3 \mathrm{OH}^{-}(\mathrm{aq})+3 \mathrm{H}_{2} \mathrm{O}(\mathrm{l}) \rightarrow \mathrm{PH}_{3}(\mathrm{~g})+3 \mathrm{H}_{2} \mathrm{PO}_{2}^{-}(\mathrm{aq})

Determine the volume of phosphine, measured in cm3\mathrm{cm}^{3} at standard temperature and pressure, that was produced.

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