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Chemistry concentration equation

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A solution in equilibrium with solid barium phospate is found to have a barium ion concentration of 0.0005 M and a Ksp of 4.1 × 10−23. Calculate the concentration of phosphate ion. Answer in units of mol/L.

Oct 18th, 2017

Ba3(PO4)2 ======> 3 Ba2+ + 2 PO43-

Initial                               0              0 

Change                         +3x          +2x

Equilibrium                      3x             2x

0.0005M = 3 x 

x = 0.0001667M

[PO4 3-] = 2*0.0001667 = 0.000333 M

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Feb 28th, 2015

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