Question

Consider the following data on some weak acids and weak bases:

acid base name formula Ko name nitrous acid formula HNO2 4.5*10-4 HF 6.8 * 10-4 ammonia NH, 1.8 x 10-5 hydrofluoric acid hydr

Use this data to rank the following solutions in order of increasing pH. In other words, select a '1' next to the solution that will have the lowest pH, a '2' next to the solution that will have the next lowest pH, and so on.

solution pH 0.1 M NaF choose one 0.1 M NH4Br choose one 0.1 M HONH3CI 1 (lowest) 0.1 M KNO2 choose one

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Answer #1

For this salt pH: formula 1 pkba-log kba-log (118108) = 7.96 Kaob HF = 8.8x104 O. IM NaF = [1] [M N 8, R1 = 2 3 BIM & HONHClpH formulas for salts weak acid + strong base -salft to pH = Ź [pkw tpka + logc] strong acid tweakbase salf to pH = ₃ [ pk

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