CaCO3CaC2O4y[Ca2+]x(x+y)y(x+y)→Ca2++CO32−→Ca2++C2O42−=x+y=4.7×10−9=1.3×10−9 yx=3.6∴x=3.6yy(3.6y+y)=1.3×10−9y=1.6×10−5[Ca2+]=(x+y)=(1.6×10−5)+(5.76×10−5)=7.46×10−5M
The value of K_s p of CaCO_3 and CaC_2 O_4 are 4.7 × 10^-9 and 1.3 × 10^-9 respectively at 25° C. If the mixture of these two is washed with water,…
NEET UG 2013 — Chemistry Physical Chemistry
2013mcqhard
The value of Ksp of CaCO3 and CaC2O4 are 4.7×10−9 and 1.3×10−9 respectively at 25∘C. If the mixture of these two is washed with water, what is the concentration of Ca2+ ions in water?
Official previous-year question
Held on 30 Apr 2013 · Verified 9 Jul 2026.
Options
- A
5.831×10−5M
- B
6.856×10−5M
- C
3.606×10−5M
- D
7.746×10−5M
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