Two formula units of Al₂(SO₄)₃(aq) are mixed with 3 formula units of Ba(NO₃)₂(aq)

CHEMISTRY · Single correct · A Level · Chemistry · Amount of substance · Amount of substance

Problem

Two formula units of Al₂(SO₄)₃(aq) are mixed with 3 formula units of Ba(NO₃)₂(aq). They react according to Al₂(SO₄)₃(aq) + 3 Ba(NO₃)₂(aq) → 3 BaSO₄(s) + 2 Al(NO₃)₃(aq). Which of the following lists the species and their quantities present after the reaction goes to completion? (a) 2 BaSO4(s), 3 Al(NO3)3(aq), 0 Al2(SO4)3(aq)2\,\text{BaSO}_4(s),\ 3\,\text{Al(NO}_3)_3(aq),\ 0\,\text{Al}_2(\text{SO}_4)_3(aq) (b) 3 BaSO4(s), 2 Al(NO3)3(aq), 1 Al2(SO4)3(aq)3\,\text{BaSO}_4(s),\ 2\,\text{Al(NO}_3)_3(aq),\ 1\,\text{Al}_2(\text{SO}_4)_3(aq) (c) 3 BaSO4(s), 2 Al(NO3)3(aq), 0 Al2(SO4)3(aq)3\,\text{BaSO}_4(s),\ 2\,\text{Al(NO}_3)_3(aq),\ 0\,\text{Al}_2(\text{SO}_4)_3(aq) (d) 6 BaSO4(s), 4 Al(NO3)3(aq), 0 Al2(SO4)3(aq)6\,\text{BaSO}_4(s),\ 4\,\text{Al(NO}_3)_3(aq),\ 0\,\text{Al}_2(\text{SO}_4)_3(aq)

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