Question

Of the following solutions, which has the greatest buffering capacity? 0.287 M HF and 0.156 M NaF o 1.15 M HF and 0.624 M NaF They are all buffer solutions comprised of the same components and would all have the same capacity. 0.574 M HF and 0.312 M NaF 0.189 M HF and 0.103 M NaF

i heard different answers for this could someone explain?

Answer 1

Henderson Hasselbalch PH = pka & wg [conjugate base] [weak Acid] & if [ conjugate Base] [weak Acid Buffer Z is Capacity 3 Maximum & Moeston if the ratio of [conjugate base] is es is [weak Acid] to 1, buffering capacity will be more closer ak [conjugate base) [weak Acid] [conjugate base) [weak Acid] Buffering capacity Buffering Capacity decreases decreases Here we have – 0.156 0.287 O @ Cote ③ WRONG rovert - 0.544 0534 0.54 = [Naf] - [HE] 0.624 1.15 0.543 WR 0.312 (NAF) (HF) - 0.574 - 0.544 Highest Buffer Capacity ® (was 0.02 0.103 6545 0.545 CHF) 0.189