Chemistry · Oct / Nov 2022 · Paper 11 · Question 3
5070Identification of ions and gases
An aqueous solution contains a salt, Y. Addition of an aqueous solution X results in a precipitate being formed that redissolves when more X is added. What could solution X and salt Y be?
- AHCl(aq) and AgNO3
- BH2SO4(aq) and Ba(NO3)2
- CNaOH(aq) and CuSO4
- DNaOH(aq) and ZnSO4
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Correct answer: D. NaOH(aq) and ZnSO4
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