Propionic acid it a weak organic acid. A 0.123 M propionic solution it titrated
ID: 509881 • Letter: P
Question
Propionic acid it a weak organic acid. A 0.123 M propionic solution it titrated by a 0.123 M sodium hydroxide solution. The initial Volume of the propionic solution is 65.0 ml.. The K- of propionic acid is 1.34 times 10^-5. A. Write the overall reaction with the correct states for the reaction between propionic solution and sodium hydroxide. B. Write the net ionic reaction for pan A (include- stales). C. Calculate the pH before any sodium hydroxide has been added (initial solution) D. Calculate the pH after 20.0 ml, of sodium hydroxide has been added. F. Calculate the pH at the half-equivalence pointExplanation / Answer
yes . you are correct . A, B, C, D all are 100 % correct
E)
Ka = 1.34 x 10^-5
pKa = -log Ka
pKa = -log (1.34 x10^-5)
pKa = 4.87
at half -equivalence point . millimoles of acid = millimoles of salt . so here pH = pKa
pH = 4.87
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