When 15.0 mL of a 5.28×10-4 M chromium(III) nitrate solution is combined with 22.0 mL of...
When 15.0 mL of a
5.28×10-4 M chromium(III)
nitrate solution is combined with 22.0 mL
of a 8.07×10-4 M sodium
phosphate solution does a precipitate
form? (yes or no)
For these conditions the Reaction Quotient, Q, is equal to
.
Homework Answers
Does a precipitate form? : Yes
Reaction quotient, Q = 1.03 x 10-7
Explanation
Total volume = 15.0 mL + 22.0 mL
Total volume = 37.0 mL
[Cr3+] = (initial concentration chromium (III) nitrate) * (initial volume / total volume)
[Cr3+] = (5.28 x 10-4 M) * (15.0 mL / 37.0 mL)
[Cr3+] = 2.14 x 10-4 M
[PO43-] = (initial concentration sodium phosphate) * (initial volume / total volume)
[PO43-] = (8.07 x 10-4 M) * (22.0 mL / 37.0 mL)
[PO43-] = 4.80 x 10-4 M
Reaction quotient, Q = [Cr3+][PO43-]
Q = (2.14 x 10-4 M) * (4.80 x 10-4 M)
Q = 1.03 x 10-7
Since Q > Ksp, therefore precipitate will form.
Add Answer to:
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