94.20 mL of 0.800 M potassium hydroxide reacts with 125.0 mL of a solution containing oxalic acid,which is a diprotic species.What is the concentration of the acid solution?
A) 0. 542 M
B) 0. 603 M
C) 0. 301 M
D) 1.38 M

Question

Quizplus · Accepted Answer

Oxalic acid (H2C2O4) is diprotic, meaning it can donate two protons. The balanced reaction with KOH is: H2C2O4 + 2KOH → K2C2O4 + 2H2O. The moles of KOH used are 0.0942 L * 0.800 mol/L = 0.07536 mol. Since 2 moles of KOH react with 1 mole of oxalic acid, the moles of oxalic acid are 0.07536 mol / 2 = 0.03768 mol. The concentration of oxalic acid is 0.03768 mol / 0.125 L = 0.301 M.

9420 ML of 0