How many gram of CaC2O4 will dissolve in distilled water to make one litre of saturated solution ? (Ksp = 2.5 × 10-9 and its molecular mass is 128)

Question

How many gram of CaC2O4 will dissolve in distilled water to make one litre of saturated solution ? (Ksp = 2.5 × 10-9 and its molecular mass is 128) (A) 0.0064 g (B) 0.0128 g (C) 0.0032 g (D) 0.0640 g

Tardigrade Admin · Accepted Answer

CaC2O4 leftharpoons Ca2++C2O2-4 Ksp=[Ca+2] [C2O-24] Ksp=s2 s=√Ksp=√2.5× 10-9 =5× 10-5 mol L-1 Solubility of g L-1=5×10-5× mol. wt. =5 × 10-5 × 128 =0.00640 g L-1

Q. How many gram of CaC2​O4​ will dissolve in distilled water to make one litre of saturated solution ? (Ksp​=2.5×10−9 and its molecular mass is 128)

0.0064 g

0.0128 g

0.0032 g

0.0640 g

CaC2​O4​⇌Ca2++C2​O42−​ Ksp​=[Ca+2][C2​O4−2​] Ksp​=s2 s=Ksp​​=2.5×10−9​ =5×10−5molL−1 Solubility of gL−1=5×10−5× mol. wt. =5×10−5×128 =0.00640gL−1

Q. How many gram of $C a C_{2} O_{4}$ will dissolve in distilled water to make one litre of saturated solution ? $(K_{s p} = 2.5 \times 1 0^{- 9}$ and its molecular mass is $128$ )