O-LevelChemistryAcids, Bases & Salts5070/22 · May/June 2022 · Q16 Marks
Choose from the following compounds to answer the questions. AgCl Ba(NO3)2 KI KMnO4 K2SO3 Mg(NO3)2 Na2CO3 Na3N NH4CL ZnSO4 Each compound may be used once, more than once or not at all. State which compound:
- (a)is purple in colour[1]
- (b)reacts with aqueous sodium sulfate to form a white precipitate[1]
- (c)reacts with aqueous chlorine to give a brown solution[1]
- (d)is prepared using a precipitation reaction[1]
- (e)contains an anion with a charge of -3[1]
- (f)is used to test for a reducing agent.[1]
Mark scheme
Marking points from the official mark scheme (May/June 2022). The mark or mark type is shown in brackets.
- [1] KMnO4
- [1] Ba(NO3)2
- [1] KI
- [1] AgCl
- [1] Na3N
- [1] KMnO4
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