(Answered) A solution containsnbsp770times10-3nbspmnbspammonium

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A solution contains 7.70×10^-3 M ammonium phosphate and 7.51×10^-3 M potassium hydroxide.

Solid chromium(III) acetate is added slowly to this mixture.

What is the concentration of hydroxide ion when phosphate ion begins to precipitate?

[hydroxide] = ____M

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