How can I maintain pH of heavy metal solution using buffer?

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Efren Garcia-Ordiales Popular answer

Can you explain better this question? I do not understand your question. When you want to preserve heavy metals you usually use an acid as HCl or HNO3 because you need to goal a pH

Efren Garcia-Ordiales

Carolina Falcón García

Dear Efren,

is there a way to increase the pH of a metal ion aqueous solution without causing precipitation? I have tried to neutralize CuSO4 and Al2(SO4)3 solutions with no success.