A detergent (C 12 H 25 SO 4 Na) solution becomes a colloidal solution at a concentration of 10 –3 mol/lit. On an average 10 13 colloidal particles are present in 1 mm 3 what is average number of C 12 H 25 SO 4 Na in one colloidal particle ?
Text Solution
Verified by Experts1
60
Sol. 1 litre colloidal solution contains = 10 –3 × N A molecule of C 12 H 25 SO 4 Na.
1 mm 3 colloidal solution contains = 
= 6 × 10 14 molecule of C 12 H 25 SO 4 Na.
10 13 colloidal particles = 6 × 10 14 molecule of C 12 H 25 SO 4 Na.
1 colloidal particle = 
molecule of C 12 H 25 SO 4 Na = 60 molecules.
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