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A solution contains 9.25x103 M copper(II) nitrate and 1.40x102 M manganese(II) acetate. Solid potassium carbonate is added slowly to this mixture.
A. What is the formula of the substance that precipitates first?
B. What is the concentration of carbonate ion when this precipitation first begins?

Respuesta :

Answer:

Explanation:

Concentration of CuāŗĀ² = 9.25 x 10Ā³ M

Concentration of MnāŗĀ² = 1.4 x 10Ā² M

solubility product of copper carbonate = 7.08 x 10ā»ā¹

solubility product of manganese Ā carbonate = 2.24 x 10ā»Ā¹Ā¹

solubility product of later is less so carbonate of manganese will come out first .

B )

[ MnāŗĀ² ] [ COā‚ƒā»Ā² ] = 2.24 x 10ā»Ā¹Ā¹

1.4 x 10Ā² Ā [ COā‚ƒā»Ā² ] = 2.24 x 10ā»Ā¹Ā¹

[ COā‚ƒā»Ā² ] = 1.6 x 10ā»Ā¹Ā³ .

the concentration of carbonate ion when this precipitation first begins

= 1.6 x 10ā»Ā¹Ā³ M .

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