TERMS TO REMEMBER

TERMS TO REMEMBER

1. SOLUTION

   • homogeneous mixture of solute and solvent whose proportion varies within certain limits
     • SOLVENT
       • substance present in larger quantities in a solution
     • SOLUTE
       • substance present in smaller quantities in a solution

2. MOLE

   • molecular mass of the substance expressed in grams

3. MOLARITY

   • number of moles of solute present in 1 litre of solution
   • M = mol solute / L of solution

4. MOLALITY

   • number of moles of solute present in 1 kg of solvent
   • m = mol solute / kg of solvent

5. MOLE FRACTION OF SOLUTE

   • ratio between the number of moles of solute and the total number of moles present in solution
   • X1 = no. of mol of solute / no. of mol present in solution
   • MOLE FRACTION OF SOLVENT
     • ratio between the number of moles of solvent and the total number of moles present in solution
     • X2 = no. of mol solvent / no. of mol present in solution

6. PERCENTAGE BY MASS

   • number of grams of solute present in 100 g of solution
   • % = (g of solute / g of solution) * 100