At 18°C equivalent conductivities of 0.01N solutions ofHCl acid,NaCl,CH3COONa andCH3COOH are 369.3, 101.7 and 14.3 ohm–1cm2 respectively.Calculate the hydrogen ion concentration in 0.01N acetic acid at 18°C.

At 18°C equivalent conductivities of 0.01N solutions ofHCl acid,NaCl,

1.	At 18°C equivalent conductivities of 0.01N solutions ofHCl acid,NaCl,CH3COONa andCH3COOH are 369.3, 101.7 and 14.3 ohm–1cm2 respectively.Calculate the hydrogen ion concentration in 0.01N acetic acid at 18°C.
Answer» As GIVEN,Eq. conductance of CH 3 COOH=369.3−101.7+71.7=339.3soα=14.3/339.3=0.041so hydrogen ion conc.=cα=0.01×0.041=4×10 −4