Which of the following alternatives gives the

pH

, concentrations of

HC_(2)O_(4)^(-)

and

C_(2)O_(4)^(2-)

species\ respectively, for a

10.0M

oxalic acid solution?\ (oxalic acid:

K_(a1)=6.5\\\\times 10^(-2);K_(a2)=6.1\\\\times 10^(-5)

)\ It is valid to assume that the contribution to the

H_(3)O^(+)

contribution of the second dissociation is\ negligible. Also make the simplifying assumption that the equilibrium concentration of oxalic acid is\ equal to

10.0M

.\

1.1;4.1\\\\times 10^(-3)M;2.0\\\\times 10^(-5)M

\

0.09;0.81M;6.1\\\\times 10^(-5)M

\

0.2;0.2M;3.2\\\\times 10^(-4)M

\

1;0.1M;2.5\\\\times 10^(-4)M

\ None of the above

Which of the following alternatives gives the pH, concentrations of HC2O4and C2O42 species respectively, for a 10.0M oxalic acid solution? (oxalic acid: Ka1=6.5102;Ka2=6.1105 ) It is valid to assume that the contribution to the H3O+contribution of the second dissociation is negligible. Also make the simplifying assumption that the equilibrium concentration of oxalic acid is equal to 10.0M. 1.1;4.1103M;2.0105M 0.09;0.81M;6.1105M 0.2;0.2M;3.2104M 1;0.1M;2.5104M None of the above