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11. The ionization constant of lactic acid, CH3CHOHCO2H , is 1.36 x 10 - 4. If...

11. The ionization constant of lactic acid, CH3CHOHCO2H , is 1.36 x 10 - 4. If 20.0 g of lactic acid is used to make a solution with a volume of 1.00 Liter, what is the concentration of the hydrogen ion in the solution?

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Expert Solution

Molar mass of Lactic acid (C3H6O3) = 3 * 12 + 6 * 1 + 3 * 16 = 90 gm/mol

Number of moles of lactic acid = 20/90 = 0.222M

                          

Initial                     0.222M                0                0

Final                   (0.222-x)M              x                x

assuming 0.222-x is approximately equal to 0.222

Hence the concentration of hydrogen is equal to 5.497 * 10^(-3) moles/liter

queen_honey_blossom answered 2 years ago
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