Jack mixes 82 mL of 4.0x10−4M silver acetate with 18 mL of 1.0x10−4M Sodium Chloride. Write the overall reaction. Write the net ionic equation. Will precipitate form if Ksp AgCl is 1.6x10−10?

1 Answer
anor277
Jun 18, 2016

Ag++Cl−→AgCl(s)⏐↓

Explanation:

Ksp=1.6×10−11.

A precipitate WILL form if [Ag+][Cl−]>Ksp.

[Ag+]=4.0×10−4⋅mol⋅L−1×0.082⋅L0.082⋅L+0.018⋅L=3.28×10−3⋅mol⋅L−1

[Cl−]=1.0×10−4⋅mol⋅L−1×0.018⋅L0.082⋅L+0.018⋅L=1.8×10−6⋅mol⋅L−1

Note that I have added the volumes together, but we still have units of mol⋅L−1 in each case; i.e. a concentration.

So the ion product Q = 1.8×10−6×3.28×10−3

If calculated ion product>Ksp precipitatiion will occur.

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