Question

why kcl and kno3 used as a salt bridge ...it should disturb the neutrality which is the function of salt bridge ..is nacl also useD?or any other aexcept gelatin and agar agar and if not ynot

Answer 1

Salt bridge maintain the electrical neutrality of the cell. The main point of consideration while choosing a salt brigde is that the velocity of anion and the velocity of cation are equal. In KCl and KNO3 , gelatin and agar agar gel the velocity of anion and cation are equal but in case of NaCl velocities are not equal so it is not used as salt bridge.
Hope this helps..