0.682g of an unknown weak acid HA was dissolved in sufficient water to make 50mL off solution.the HA solution was titrated with 0.135M NaOH sol. after the additon og 10.6mL of base, aph of 5.65 was record. the equivalence point was reached after the addittion of 27.4mL of the 0.135M NaOH .(Ka for HA is 1.4x 10^-6)
a) what is the pH of solution when the original cid solution is half-neutralized?
b) calculate the pH of the solution at equivalent point

Question

0.682g of an unknown weak acid HA was dissolved in sufficient water to make 50mL off solution.the HA solution was titrated with 0.135M NaOH sol. after the additon og 10.6mL of base, aph of 5.65 was record. the equivalence point was reached after the addittion of 27.4mL of the 0.135M NaOH .(Ka for HA is 1.4x 10^-6) 
a) what is the pH of solution when the original cid solution is half-neutralized?
b) calculate the pH of the solution at  equivalent point