Is this the right way to approach solubility problem?

[Sunwoo Bae]

Homework Statement

7. Lead(II)-carbonate deposits on surface of the water pipes. Taking into account the solubility of lead(II) carbonate calculate the mass of lead dissolved in 1 L of water pipes.

Relevant Equations

Ksp of PbCO3 = 1.8166 * 10^-7M

Is my work and the answer correct?

If not, how should I approach this problem?

Thank you!

 

[Borek]

Approach looks OK, no idea if the numbers are correct. Please note PF is not a place for checking your homework.

This is a poorly thought question in general. Solubility of carbonates strongly depends on the pH. Tap water has pH around 7, so carbonates are present mostly as HCO₃^- and the PbCO₃ solubility would be orders of magnitude higher than the one you calculated.

 

[mjc123]

" Ksp of PbCO3 = 1.8166 * 10^-7M "
Is this the solubility product or the solubility? Why do you use a different value of Ksp in your solution?