Introduction to Dilutions
This worksheet introduces students to the concept of dilutions, including calculations and practical applications.
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Introduction to Dilutions
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Read each question carefully and provide your best answer. Show all your work for calculation problems.
1. What is the primary purpose of dilution?
To increase the concentration of a solution
To decrease the concentration of a solution
To change the solvent of a solution
To increase the volume of solute
2. Which formula is commonly used for dilution calculations?
PV = nRT
M1V1 = M2V2
E = mc²
pH = -log[H+]
3. When diluting a solution, you add more to decrease the concentration of the .
4. The initial solution before dilution is often referred to as the solution.
5. A student needs to prepare 500 mL of a 0.25 M NaCl solution from a 2.0 M stock solution. Calculate the volume of the stock solution needed. Show your work.
6. Dilution changes the total number of moles of solute in a solution.
True
False
7. You have a concentrated acid solution and need to dilute it. Describe the safety precautions you should take. (Consider the image below for context, but do not directly reference it in your answer.)
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