Asolution is prepared by dissolving 4.78 g of an unknown nonelectrolyte in enough water to make 375 ml of solution. the osmotic pressure of the solution is 1.33 atm at 27c. what is the molar mass of the solute?

The molar mass of the solute is 236.0 g/mol

Explanation:

To calculate the concentration of solute, we use the equation for osmotic pressure, which is:

where,

= osmotic pressure of the solution = 1.33 atm

i = Van't hoff factor = 1 (for non-electrolytes)

M = molarity of solute = ?

R = Gas constant =

T = temperature of the solution =

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 = 0.0540 M

Given mass of solute = 4.78 g

Volume of solution = 375 mL

Putting values in above equation, we get:

Hence, the molar mass of the solute is 236.0 g/mol

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.