Which of these reactions is a double displacement reaction?
A) K(s) + H2O(l) ? H2(g) + KOH(aq)
B) Mg(s) + HClO4(aq) ? Mg(ClO4) 2(aq) + H2(g)
C) BaO(s) + H2O(l) ? Ba(OH) 2(aq)
D) CH3COOH(aq) + K2CO3(aq) ? H2O(l) + CO2(g) + KCH3COO(aq)
Correct Answer:
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