SCH 3U

Concentration and Dilution Practice Problems

• Calculate the concentration (mol/L) of a solution that contains 10g of HCL in 100mL of solution.



• A solution contains 0.1 mol HC₂H₃O₂ dissolved in 0.5 L of solution. Calculate the concentration (mol/L) of the solution.



• 500 mL of a solution contains 0.1 mol HC₂H₃O₂. Calculate the concentration of the solution if it is diluted with water to the 1 L mark.



• How many moles of acetic acid are required to make 125 mL of a 0.5 mol/L solution?



• Give directions for preparing 2.0 L of 0.250 mol/L HCl using 11.7 mol/L Hcl.



• A 300mL solution containing 23g of NaCl is mixed with a 500 mL solution containing 15g of Na₂SO₄. Assuming the solutions are additive determine the concentrations of each of the 3 ions (chloride, sodium and sulphate).



• By the addition of water, 30.0mL of 6.0 mol/L H₂SO₄ is diluted to 150.0 mL. What is the concentration of H₂SO₄ after dilution?



• What volume of 6.0 mol/L hydrochloric acid is needed to preparre 300 mL of 0.300 mol/L solution?



• How many grams of Ba(NO₃)₂ are in 590mL of a 0.41mol/L solution?

• How many grams of lithium iodide are in 1610mL of a 0.1mol/L solution?



• What is the molarity of a solution which contains 10470mg of NH₄NO₃ in a total volume of 770mL?