Question

For each solution: a.) Calculate the molarity b.)Write a chemical equation representing the formation of a solution your equation should start with: CH3CH2OH----> c.) Draw a molecular picture of the solution showing ions , solute molecules and water molecules

Ethanol solution: 2.00 mL ethanol (d=0.789g/mL) to make 150. mL of solution

Answer 1

a) Ethanol solution: 2.00 mL ethanol (d=0.789g/mL) to make 150. mL of solution

Molarity = (amount of solute present in the solution/ its molecular weight)* 1000/volumume of solution in ml

           = (2ml* 0.789g/ml)/46 g * 1000/150ml                       (since amount of substance= density * volume)

           = 0.229 M

b) Ethanol is a very weak acid and does not dissociate to any appreciable amount.

CH3CH2OH         +               H2O        --->           H3O⁺ +   CH3CH2O^-

c)molecule                  molecule                    ion           ion