# CHEMISTRY

Now given that the molar solubility of PbCrO4 (Pb2+ and CrO4 2-) is 1.40 x 10 -8 mol/L, find the Ksp

1. Write the expression for Ksp

Subtitute the numbers and solve.
Post your work if you gt stuck.

posted by DrBob222
2. How many kilograms of chalcopyrite needs to be mined to get 325g of pure Cu?

posted by Vivian
3. So my ksp expression is
Ksp=(Pb2+)^1(CrO4)^1
Ksp=(1.40 x 10^-8)^1(1.40 x 10^-8)^1
Ksp=1.96 x 10^-16
Is this right?

posted by Anonymous
4. Yes, that's ight. You know, of course, that the exponents 1 are not needed; however, there is nothing wrong with putting them there AND it serves to remind you each time to place an exponent. Many of my students through the years forgot the exponent. Good work!

posted by DrBob222
5. Don't piggy back your question on another question. Usually those get ignored. When you repost as a separate question, show the equation you want to use to go from chalcopyrite to Cu.

posted by DrBob222

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