Question

Please ans as soon as possible

0.1 M Phosphate Buffer

PH 6.6	a)10ml +200ul in HCL b)10ml+200ul in NaOH	a)Beaker#1 b)Beaker#2	PH-6.6 PH-6.6	After adding HCL PH-6.24 After adding NaOH PH-7.04
PH 7.6	a)10ml +200ul in HCL b)10ml+200ul in NaOH	a)Beaker#1 b)Beaker#2	PH-7.6 PH-7.6	After adding HCL PH-7.04 After adding NaOH PH-10.19
PH 8.6	a)10ml +200ul in HCL b)10ml+200ul in NaOH	a)Beaker#1 b)Beaker#2	PH-8.6 PH-8.6	After adding HCL PH-7.24 After adding NaOH PH-11.00

1.0 M Phosphate Buffer PH 7.6

Beaker .1	20ml Stock PH-7.6	Phosphate +H2O PH 7.6	Adding of 200ul of HCl PH-7.64
Beaker .2	18ml H2O+2ml of Stock from beaker 1	Phosphate +H2O PH 7.52	Adding of 200ul of HCl PH-6.96
Beaker .3	18ml H20+2ml of stock from beaker 2	Phosphate +H2O PH 7.51	Adding of 200ul of HCl PH-2.30

From these buffering measurements, which solution best resisted changes in pH when acid was added and How does the change in pH of the buffer affect its buffering capacity?

Answer 1

The buffer solution of beaker 1.1 is the most resistant to pH changes when acid is added, since the same amount of acid is added to the 3 solutions and the lowest pH change is recorded in that beaker.

The buffer capacity measures the amount of pH change that a buffer solution undergoes, depending on the amount of acid and / or base added to the system. The lower the pH change, the greater the buffer capacity.

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