Molarity and Dilution Worksheet
A Grade 10 science worksheet covering molarity calculations and dilution principles with practical problems.
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Molarity and Dilution Worksheet
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Read each question carefully and provide your answers in the space provided. Show all your work for calculations.
1. Molarity is defined as the number of of solute per liter of solution.
2. When diluting a solution, the amount of remains constant.
3. The formula for dilution is M1V1 = .
1. Calculate the molarity of a solution prepared by dissolving 15.0 g of NaCl (molar mass = 58.44 g/mol) in enough water to make 250 mL of solution.
2. How many grams of potassium iodide (KI, molar mass = 166.00 g/mol) are needed to prepare 500 mL of a 0.20 M solution?
1. Adding more solvent to a solution increases its molarity.
True
False
2. Dilution is the process of decreasing the concentration of a solute in a solution, usually by adding more solvent.
True
False
1. If you have 100 mL of a 2.5 M stock solution of HCl, how much water must be added to dilute it to a 0.5 M solution?
2. A 1.5 M solution of NaOH needs to be diluted to 0.25 M. If the final volume desired is 750 mL, what volume of the concentrated NaOH solution is needed?
1. Which of the following is NOT affected when a solution is diluted?
Volume of solvent
Molarity of the solution
Moles of solute
Total volume of solution