A-LevelChemistryAtoms, molecules and stoichiometry9701/12 · Oct/Nov 2015 · Q21 Mark
Arsenic chloride, AsCl3, reacts with sodium borohydride, NaBH4. pAsCl3 + qNaBH4 → rAsH3 + sNaCl + tBCl3 What are the numbers p, q, r, s and t when this equation is balanced correctly?
Ap: 2, q: 3, r: 2, s: 3, t: 1
Bp: 3, q: 3, r: 3, s: 3, t: 2
Cp: 4, q: 3, r: 4, s: 3, t: 3
Dp: 4, q: 4, r: 4, s: 4, t: 3
✓ Correct answer
C: p: 4, q: 3, r: 4, s: 3, t: 3
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