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Interpretation:
A solution of volume 10.0 mL containing 0.166 g of catalase gives rise to an osmotic pressure of 1.2 Torr at 20°C. The molar mass of catalase has to be calculated.
Concept Introduction:
By using the Osmometric method, the molar mass of solute can be calculated as follows:
Step-1: The observed osmotic pressure has to be converted into solute molar concentration, c in the form of
c = ΠiRT
Step-2: The amount of solute (in moles) in the solution is calculated by multiplying the molar concentration of solute by the volume of solution.
nsolute = csolute × V
Step-3: The molar mass of the solute is calculated by dividing the given mass of solute (in grams) by the calculated amount in moles.
Msolute = msolutensolute
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Chapter 5 Solutions
Chemical Principles: The Quest for Insight
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