Estimate the solubility of CaCO3 in 0.1M Na2CO3. If the solubility Product constant for CaCO3 is taken to be 5X10-9 ​

Question

Estimate the solubility of CaCO3
in 0.1M Na2CO3. If the solubility
Product constant for CaCO3 is taken to be 5X10-9

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Mít Mít 3 weeks 2021-08-30T21:30:08+00:00 1 Answers 0 views 0

Answers ( )

    0
    2021-08-30T21:32:04+00:00

    Answer:

    CaCO3(s) <==> Ca2+(aq) + CO3 2-(aq)

    Let X = the amount of CaCO3 dissolved in Na2CO3 or the amount of each ions formed i.e. Ca2+ and CO3 2–. Then, put this into the formula :

    Ksp = [Ca2+] [CO3 2-]

    5 × 10^-9 = [X]*[X]

    X^2 = 5 × 10^-9

    X = √5 × 10^-9

    X = 7.07 x 10^-5 mole/L

    So, the amount of CaCO3 dissolved in 0.1M Na2CO3 or the amount of Ca2+ and CO3 2- ions produced is 7.07 x 10^-5 mole/L

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