Question

0.05 M glucose solution is iso-osmotic with which of the following solutions?Select the proper choice from the given multiple choices.
(A) 0.10 M NaC1
(B) 0.05 NaC1
(C) 0.025 M NaCl
(D) 1M NaCl

Answer 1

Both should have same Osmotic Pressure.

Therefore,  

0.05*ST = 2*CST   (2 multiplied as i for NaCL is 2 )

thus C = 1/40 = 0.025M  NaCl