Which of the following is a possible definition of a base?

a. a substance that increases the concentration of hydronium ions in a solution
b. a compound that is a hydrogen ion acceptor in an acid-base reaction
c. a compound that gives off hydrogen ions in a reaction or solution
d. a substance that is an electron pair acceptor in a reaction

Why does a red shoe appear red in daylight

Which statement best describes what happens when molecular compounds melt

Phosphoric acid is a triprotic acid ( =6.9×10−3 , =6.2×10−8 , and =4.8×10−13 ). to find the ph of a buffer composed of h2po−4(aq) and hpo2−4(aq) , which p value should be used in the henderson–hasselbalch equation? p k a1 = 2.16 p k a2 = 7.21 p k a3 = 12.32 calculate the ph of a buffer solution obtained by dissolving 18.0 18.0 g of kh2po4(s) kh 2 po 4 ( s ) and 33.0 33.0 g of na2hpo4(s) na 2 hpo 4 ( s ) in water and then diluting to 1.00 l.