What is the definition of a Lewis acid? A. A Lewis acid accepts an electron pair from a base.
B. A Lewis acid donates a proton to the solution.
C. A Lewis acid accepts a hydroxide from the solution.
D. A Lewis acid donates an electron pair to a base.

Bridget is in science class. her teacher gives her two unknown substances and asks her to determine their relative ph. she places a piece of red litmus paper into both substances. the litmus paper turns purple when she places it into substance i. the litmus paper turns blue when she places it into substance ii. a. substance i is a neutral substance and substance ii is an acid. b. substance i is a neutral substance and substance ii is a base. c. substance i is an acid and substance ii is a base. d. substance i is a base and substance ii is a neutral substance.