[Solved] A(n) ________ is a compound that dissolves into anions and cations in water. A) acid B) buffer C) base D) salt E) catalyst Sex: A biologically based categorization of living organisms, typically as male or female, based on reproductive organs and functions. Fellatio: null Anal Eroticism: Sexual activities involving the anus. Cunnilingus: Oral sex performed on female genitalia, involving the use of the mouth, lips, and tongue to stimulate the vulva or vagina.