Please Show work as im trying to understand how to get to the answer. Thank you!

Question

Please Show work as im trying to understand how to get to the answer. Thank you!

Problem 17.66 (?) 13 of 14 (5) Part A Constants Periodic Tablbe A solution of NagSO4 is added dropwise to a solution that ls 1.5x102 Min Ba2 and 1.5x102 Min Sr2 What concentration of Soi is necessary to begin precipitation? (Neglect volume changes. BasO4 : Kp-1.1x 10-0; SrSO: Kp -3.2x10-7) Express your answer using two significant figures 5.5 10-9 Submit XIncorrect; Try Again Part E Which cation precipitates first? Ba2+ precipitates first Sr+ precipitates first. Submit

Explanation / Answer

Ksp BaSO4 =[Ba+2][SO4-2]

1.1*10^-10 = (0.015) * [SO4-2]

[SO4-2] = (1.1*10^-10) /(0.015)

= 7.3*10^-9 M required for BaSO4

Ksp SrSO4 =[Sr+2][SO4-2]

3.2*10^-7 = (0.015) * [SO4-2]

[SO4-2] = (3.2*10^-7) /(0.015) = 2.13*10^-5 M required for SrSO4 to precipitate

(b) Ba2+ precipitates first because it required less H2SO4

(c)

Ksp SrSO4 =[Sr+2][SO4-2]

3.2*10^-7 = (0.015) * [SO4-2]

[SO4-2] = (3.2*10^-7) /(0.015) = 2.13*10^-5 required for SrSO4 to precipitate

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