Question 6 2 points What is the molarity of a NaOH solution

Question 6 (2 points) What is the molarity of a NaOH solution if 25.3 mL are needed to titrate a 0.7143 g sample of KHP? Your Answer: units Save All Responses Go to Submit Quiz 25 MacBook Air F4 F5 1 F7 F8 F9 5

Solution

KHC8H4O4 + NaOH -----------------> NaKC8H4O4 + H2O

1 mole               1 mole

no of moles of KHP   = W/G.M.Wt

                                 = 0.7143/204.22   = 0.0035 moles

1 mole of KHP react with 1 mole of NaOH

0.0035 moles of KHP react with 0.0035 moles of NaOH

no of moles of NaOH = molarity * volume in L

0.0035                       = molarity * 0.0253

molarity                  = 0.0035/0.0253    = 0.138M

molarity of NaOH = 0.138M