To calculate:
The osmotic pressure (π) of (a) NaCl solution, (b) MgCl2 solution, (c) mixture
Answer to Problem 11.82QA
Solution:
Osmotic pressures are as follows:
Explanation of Solution
1. Concept:
NaCl will dissociate into two ion as per the above equation, so the value for van’t Hoff’s factor (i) = 2
MgCl2 will dissociate into a total of three ions as per the above equation, so the value for van’t Hoff’s factor (i) =
2. Formula:
i.
Where,
A mole is the SI unit of amount chemical substance. When writing units, it is written as “mol”.
ii. Molarity is defined as:
3. Given:
i.
ii.
iii.
iv.
v.
4. Calculations:
a. Osmotic pressure (π) for NaCl:
Converting given mill molar solution into Molar solution as follows:
Calculating osmotic pressure for NaCl:
b. Osmotic pressure for MgCl2:
Converting given mill molar solution into Molar solution as follows:
c. Osmotic pressure for mixture of solution:
Conclusion:
Osmotic pressures are as follows:
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