Which of the following could be added to 1.0 liter of 0.10 M HC2H3O2 (Ka = 1.8 x 10^-5) to form a buffer solution with pH between 4 and 5?
1. 0.050 mol HCI
II 0.050 mol NaOH
III. 0.050 mol NaC2H:02
a. I only
b. II only
c. I and II only
d. II and III only
e. I and III only

answer; i believe that the correct answer is (a) potassium(k)

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.

a is the correct answer

here is table 2-2:

country

percent of eligible voters that voted

rank

united states

44.9%

138

canada

60.1%

107

costa rica

84.6%

14

hungary

66.9%

82

japan

57.0%

118

egypt

27.7%

159

south africa

85.5%

10

ans is no, the data set cannot be plotted as a single circle graph