Question

Determine starting from a 0.1M stock solution of acetic acid and sodium acetate , how would you prepare 250mls of 0.0800M acetate buffer with a pH of 4.50

Answer 1

Answer:

Given

strenght of the buffer (N1) =0.1M

To prepare:

strenght of the buffer (N2) 0.0800M with volume (V2) 250 ml

so we can use the volumetric forumal V1N1/V2N2 to fine V2

now the formual will be V2 = V1N1/N2

=(250*0.0800)/0.1

= 20 ml

so now we need 20ml of the stock solution in 250 ml SMF and dilute with distilled water.

In preparing the buffer solution the use diferante molarity solution will not affect the Ph more.

So adjust the Ph using acetic acid till we get Ph of 4.50