A buffer solutionis prepared by mixing 50 mL of 0.2 Mof acetic acid with .x. mL of 0.2 M of NaOHsolutions. If pH of the resulting buffersolutions is 4. 7 then value of .x.is (Ka= 2xx10 ^(-5))

A buffer solutionis prepared by mixing 50 mL of 0.2 Mof acetic acid wi

1.	A buffer solutionis prepared by mixing 50 mL of 0.2 Mof acetic acid with .x. mL of 0.2 M of NaOHsolutions. If pH of the resulting buffersolutions is 4. 7 then value of .x.is (Ka= 2xx10 ^(-5))
Answer» 28 mL 22 m L 24 mL 25 mL Solution :` pH =pKa +log "" ([S])/([A]), 4.7 =4.7 +log "" ([S])/([A]) ` `RARR [S]=[A]` ` x XX 0.2 = 50 xx 0.2 - x xx 0.2 ` `rArr x = ( 50 xx 0.2)/(2 xx 0.2 )= 25 mL `