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4_nano_acid_base_post

4_nano_acid_base_post - Review of acid-base reactions pH...

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4. Acid/base 1 pH = -log[H + ] pOH = -log[OH] k w = [H + ][¯OH] = 1 x 10 -14 pH + pOH = 14 neutral solution [H + ] = [ ¯OH] = 1 x 10 -7 pH = 7 acidic solution [H + ] > 1 x 10 -7 pH range 0 to 7 basic solution [H + ] < 1 x 10 -7 pH range 7 to 14 General formula for an acid HA; for a base B HA H + + A¯ B + H 2 O B + H + ¯OH k a = [H + ][A¯] k b = [¯OH][B + H] [HA] [B] taking the log of both sides Henderson-Hasselbalch equations pH = pk a + log[A¯] pOH = pk b + log[B + H] [HA] [B] strong acid [H + ] , k a , pk a strong base [¯OH] , k b , pk b weak acid [H + ] , k a , pk a weak base [¯OH] , k b , pk b relationship between conjugate acid base pairs k a x k b = k w =1 x 10 -14 pk a + pk b = 14 Brønsted-Lowry acids and bases Review of acid-base reactions
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