sebuah. Pb2+(aq) + SO4 2–(aq) t PbSO4(s)
b. HCl(aq) + SO42–(aq) t HSO4 –(aq) + Cl–(aq)
c. SO42– + 4H3O+(aq) + 2e– t H2SO3(aq) + 5H2O(l)
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