What is the pka of the weak acid that gives the following pH curve when titrated with NaOH? 14.00 13.00 12.00 11.00 10.00 9.00 8.00 ㅎ 7.00 6.00 5.00 4.00 3.00 2.00 1.00 0.00 10 30 40 50 60 70 80 ml of NaOH added 20

4) calculate the pH of the buffer solution after the addition of 0.15 mL of sodium hydroxide based on the known value of Ka for acetic acid? 5) calculate the pH of water after the addition of 0.15 mL of 1 M NaOH?   *buffer solution by mixing 20.00 mL of 0.100 M sodium hydroxide and 40.00 mL of 0.100 M acetic acid

11,The equivalence point of titrating of the weak base with the strong acid will be observed at Group of answer choices A, pH>7 B, pH<7 C, pH=pKb D, pH>pKb E, pH=7   12,The titration curve of titrating a diprotic acid with a strong base will have two distinct equivalence points  Group of answer choices A, if Ka1<<Ka2 B, if Ka1=Ka2 C, always D, in case of ta strong acid E, if Ka1>>Ka2

An acid with pKa = 1.79 is titrated with 0.10 M NaOH. Which of the following is true   The pH at the equivalence point is below 7.The pH at the equivalence point is above 7.The pH at the equivalence point is equal to 7.