What is the change in pH when 10.0 mL of 0.250 M KOH(aq) is added to 100.0 mL of a buffer that is 0.150 M inHCOOH (aq) and 0.100 M in HCOO– (aq)?pKa = 3.75 for HCOOH (aq).
Select one:
a. –0.26 pH unit
b. +0.18 pH unit
c. +0.00 pH unit
d. –0.81 pH unit
QUESTION 2
What is the molarity of an aqueous barium hydroxide solution ifit takes 59.9 mL of 0.100 M HCl (aq) to neutralize 21.6 mLof the Ba(OH)2 (aq) solution?
Select one:
a. 0.208 M
b. 0.277 M
c. 0.139 M
d. 0.0693 M
