Question

Calculate the buffer capacity of `1L` solution of :
`(i)0.1MCH_(3)COOH` and `0.1MCH_(3)COONa`
`(ii) 0.2MCH_(3)COOH` and `0.2MCH_(3)COONa`
Given:`pK_(a)(CH_(3)COOH)=4.74`
Which will be a better buffer?

Answer 1

Buffer capcaity =`(2.303(a+x)(b-x))/(a+b)~~(2.303ab)/(a+b)xltlta,b`
Buffer capacity =`(0.1xx0.1xx2.303)/(0.1+0.1)=0.11515`
Buffer capacity `=(0.2xx0.2xx2.303)/(0.2+0.2)=0.2303`
Second buffer solution (having greater buffer capcity )can be called butter buffer.