A solution of weak acid is added to a beaker of water. Which of the following will be true as the acid is added to the w

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A solution of weak acid is added to a beaker of water. Which of
the following will be true as the acid is added to the water?
(a) [H3O+] increases, [OH−] decreases, and pH increases
(b) [H3O+] decreases, [OH−] increases, and pH decreases
(c) [H3O+] decreases, [OH−] decreases, and pH increases
(d) [H3O+] remains constant, [OH−] increases, and pH increases (e)
none of these