Chemistry Is this the right way to approach solubility problem?

AI Thread Summary
The discussion centers on the approach to solving a solubility problem involving carbonates, specifically PbCO3. Participants express uncertainty about the correctness of the calculations and emphasize that the solubility of carbonates is highly pH-dependent, particularly in tap water with a neutral pH. It is noted that the solubility of PbCO3 in such conditions would be significantly higher than initially calculated. Questions arise regarding the use of different Ksp values in the solution, prompting a need for clarification on whether the provided value refers to solubility product or solubility. Overall, the conversation highlights the importance of considering pH and accurate constants in solubility calculations.
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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?
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If not, how should I approach this problem?

Thank you!
 
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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.
 
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" 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?
 

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