In a qualitative analysis procedure, a chemist separated Ba2 from Ca2 by careful

Question

In a qualitative analysis procedure, a chemist separated Ba2 from Ca2 by carefully adjusting the concentration of CrO42–. Suppose we have a solution containing 0.020 M Ba2 and 0.010 M Ca2 and slowly increase the CrO42– concentration. What will be the concentration of Ba2 remaining in solution when CaCrO4(s) just begins to precipitate? Please help!

Thank you!

Print Ea Calculator Periodic Table Question 18 of 18 Incorrect Map General Chemistry 4th Edition this question has been customized by Edwin olmstead at Fort Hays State University e Rock Gallogly In a qualitative analysis procedure, a chemist separated Ba2 from Ca2 by carefully adjusting the concentration of Cro4 Suppose we have a solution containing 0.020 M Ba and 0.010 M Ca and 2+ slowly increase the Cro concentration. What will be the concentration of Ba remaining in solution when c just begins to precipitate? Number Ba 0.02 M what percent of the original Ba2 (aq) can be precipitated before Cacro4(s) begins to precipitate? Number A Previous Give up & View Salution 2 Check Answer Nex Exit

Explanation / Answer

Concentration of Ba+2 remaining in the soultion before CaCrO4 precipitates is 0.02M. that means no ppt of BaCrO4 was formed before CaCrO4 precipitates.

The remaining Ba+2 ions (%) = (0.02/0.02)*100 = 100 %

So the % of BaCrO4 ppt is Zero.(0%)

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