Grade upto college level Physical Chemistry

Mole fraction of the solute in a 1.00 molal aqueous solution is (1) 1.7700 (2) 0.1770 (3) 0.0177 (4) 0.0344

Shane Macguire

12 Years agoGrade upto college level

5 Answers

Deepak Patra

12 Years ago

Sol. Mole fraction of solute = 1/56.55 = 0.0177 Answer : (3)

Rajveer Singh Rathore

8 Years ago

1.00 molal aqueous solution means that 1 mol of solute is dissolved in 1 Kg of water.Hence,No. Of moles of solute = 1No. Of moles of water = 1000/18=55.556MOLE FRACTION OF SOLUTE = No. Of moles of solute/no. Of moles of solute + No. Of moles of solventMOLE FRACTION = 1/1+55.556 =0.1768[0.0177(approx.) :):):)

Poorvee

8 Years ago

Mole of water is 1000/18 =55.55 mole

Mole of solute is 1/1= 1 mole then

Mole friction of solute = 1/1+55.55 =0.1768 =0.177

Shahensa kobir

8 Years ago

Moles of water=

mass/molecular mass=1000g/18g=55.55moles.

Mole fraction of solute=(no of moles of solute)/(no of mole of solute+no of moles of solvent)=1/(1+55.55)=0.177

Sahithi pendyala

7 Years ago

1 molal of aqueous solution mean 1 MOLE OF SOLUTE PER 1KG SOLVENT. 1 mole of water for 18 gms. 55.5 moles of water per 1000 gms. Mole fraction is ratio of moles of solute to total moles of solution. Xa÷(Xa+Xb) 1 (1+55.5)=0.0177