1.A solution is prepared by mixing 50 ml of ethyl alcohol in 300 ml of distilled water.What is the percentage by volume concentration of the solution? 2.What is the volume of alcohol on 500 ml of wine which contains 12% alcohol by volume? 3.Antifreeze is a substance added to a liquid to lower the freezing point. If 4L of antifreeze is added to enough water to make 12L solution.What is the percentage by volume of the solution?
Concentration= Volume of solutionVolume of solute×100
=20050×100
=25%
Explanation:
A solution contains a mixture of Na2CO3 and NaOH. Using phenolpthalein as indicator, 25 mL of mixture required 19.5 mL of 0.995 N HCl for the end point. With methyl orange, 25 mL of the solution required 25 mL of the same HCI for the end point. Calculate g/L of each substance in the mixture.
