fgcherubin
26.07.2019 •
Chemistry
Asolution containing cacl2 is mixed with a solution of li2c2o4 to form a solution that is 3.5 × 10-4 m in calcium ion and 2.33 × 10-4 m in oxalate ion. what will happen once these solutions are mixed? ksp (cac2o4) = 2.3 × 10-9. a.nothing will happen since both calcium chloride and lithium oxalate are soluble compounds. b.nothing will happen ksp> q for all possible precipitants. c.a precipitate will form as calcium oxalate is not soluble to any extent. d.a precipitate will form since q > ksp for calcium
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Ответ:
when Ksp = [Ca2+][Ca2O4-2] = 2.3 x 10^-9
So, we need to get the value of q to compare it with Ksp:
q = [Ca2+][Ca2O4-2]
when we have [Ca2+] = (3.5 x 10^-4)
and [Ca2O4-2] = (2.33 x 10^-4)
by substitution:
q = (3.5 x 10^-4) * (2.33 x 10^-4)
= 8.155 x 10^-8
we can see that q > Ksp
∴ the correct answer is (D) a precipitate will form since q > Ksp for calcium
Ответ:
The antacid is basic and will neutralize the acid entering the esophagus OR B