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vandarughb2875
10.03.2020 •
Chemistry
1.0 g of a protein is dissolved in 100 ml of distilled water. The resulting solution has an osmotic pressure of 0.001 atm at room temperature. What is the molecular weight of the protein?
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Ответ:
The molar mass of the protein is 244678.2 g/mol
Explanation:
To calculate the concentration of solute, we use the equation for osmotic pressure, which is:
where,
i = Van't hoff factor = 1 (for non-electrolytes)
c = molarity of solute = ?
R = Gas constant =![0.0821\text{ L atm }mol^{-1}K^{-1}](/tpl/images/0539/4748/ad6df.png)
T = temperature of the solution =![25^oC=[273+25]=298K](/tpl/images/0539/4748/6a9f9.png)
Putting values in above equation, we get:
To calculate the molecular mass of solute, we use the equation used to calculate the molarity of solution:
We are given:
Molarity of solution =![4.087\times 10^{-5}M](/tpl/images/0539/4748/c74be.png)
Given mass of protein = 1.0 grams
Volume of solution = 5.00 mL
Putting values in above equation, we get:
Hence, the molar mass of the protein is 244678.2 g/mol
Ответ:
The distance between the particles decreases
Explanation:
When a liquid loses energy it is freezing causing the particles to squeeze together and vibrate instead of moving there is little to know movement or energy