Question

How do you think the conductivity of equimolar solutions of sodium chloride, calcium chloride, and iron(III) chloride compare? Why?

Answer 1

conductivity is depends on number of ions .

i = number of ions .

for NaCl : NaCl -------------> Na+ +   Cl-

i = 2

CaCl2 --------------> Ca2+   + 2 Cl-

i = 3

FeCl3 ---------------> Fe3+ +   3 Cl-

i = 4

for NaCl : i = 2 . so NaCl has less conductivity .

for FeCl3 : i = 4 . so FeCl3 has more conductivity .

number of ions increases , then conductivity also increases .

conductivity order : NaCl < CaCl2   < FeCl3