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how to prepare an acetic acid-sodium acetate buffer of the same pH and I=0.1?

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AussieKenDoll:
how to prepare an acetic acid-sodium acetate buffer of pH=5 but whose ionic strength is 0.1 from 0.1M acetic acid-sodium acetate buffer of pH=5?

Borek:
You have to show you attempts at solving the problem to receive help, this is a forum policy.

http://www.chembuddy.com/?left=buffers&right=toc

Babcock_Hall:
What do you know about ionic strength and pKa values?

AussieKenDoll:
On acetic acid-sodium acetate, there are CH3COO-,CH3+, Na+,H+ ions

0.1=1/2 [(C(+1)^2+C(-1)^2+C(+1)^2+C(-1)^2 )]
0.1=2C
C=0.05 mol dm^(-3)
CV=K
0.1mol dm^(-3)×V1=0.05 mol dm^(-3)×V2
V2/V1 =2
Make 0.05M Acetic acid/Sodium acetate buffer by taking a specific volume of the buffer and diluting buffer 2 times to achieve 0.05M.
Is this correct way of preparing an acetic acid-sodium acetate buffer of the same pH and I=0.1?

AWK:
For electrolyte of type 1:1 (sodium acetate) good approximation for I is c(sodium acetate). The acetic acid in this solution dissociates much less than 1 %.
What does mean CH3 ?

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