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A solution contains 1.30×10-2 M barium nitrate and 1.27×10-2 M zinc acetate. Solid ammonium carbonate is...

A solution contains 1.30×10-2 M barium nitrate and 1.27×10-2 M zinc acetate.
Solid ammonium carbonate is added slowly to this mixture.

A. What is the formula of the substance that precipitates first?

formula =




B. What is the concentration of carbonate ion when this precipitation first begins?
[CO32-] =

M

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