Calculate the concentrations of H2C2O4, HC2O4, C2O4^-2, and H+ species in 0.230

Question

Calculate the concentrations of H2C2O4, HC2O4, C2O4^-2, and H+ species in 0.230 M oxalic acid solution (Ka1= 6.5 x 10 ^-2 , Ka2=6.1 x 10 ^-5). Be sure to report your answers to the correct number of significant figures.

Be sure to answer all parts. Calculate the concentrations of H,C204,HC204,C2042',and H species in a 0.230 M 224 2424' oxalic acid solution. K oxalic acid solution. (Ka , 6.5 x10 6.5 × 10-2, Ka-6.1 × 10-5). Be sure to report your answers to K.1x10 5). Be sure to report your answers to the correct number of significant figures. [HC204-]- x 10 M Enter your answer in scientific notation.

Explanation / Answer

H2C2O4 -----------------> H+ + HC2O4-

0.230                                 0            0

0.230- x                             x            x

Ka1 = x^2 / 0.230 -x

6.5 x 10 ^-2 = x^2 / 0.230 -x

x = 0.0940

[HC2O4-] = 0.0940 M

[H+] = 0.0940 M

[H2C2O4] = 0.230 - 0.0940

[H2C2O4] = 0.136 M

[C2O42-] = 6.1 x 10^-5 M

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