How to Calculate Dilution Solutions

How to Calculate Dilution Solutions
••• Yanawut/iStock/GettyImages

A dilution solution contains solute (or stock solution) and a solvent (called diluent). These two components proportionally combine to create a dilution. You can identify a dilution solution by the amount of solute in the total volume, expressed as a proportion. For example, a chemical may be prepared in a 1:10 dilution of alcohol, indicating that a 10 mL bottle contains one milliliter of chemical and nine milliliters of alcohol. You can calculate the necessary volume of each component to prepare a dilution solution.

    Write down the desired final volume of the solution--for example, 30 mL.

    Write down the desired dilution in the form of a proportion--for example, 1:20 dilution, also known as the dilution factor.

    Convert the dilution factor to a fraction with the first number as the numerator and the second number as the denominator. For example, a 1:20 dilution converts to a 1/20 dilution factor.

    Multiply the final desired volume by the dilution factor to determine the needed volume of the stock solution. In our example, 30 mL x 1 ÷ 20 = 1.5 mL of stock solution.

    Subtract this figure from the final desired volume to calculate the volume of diluent required--for example, 30 mL - 1.5 mL = 28.5 mL.

    Measure the amount of stock solution required -- in our example, 1.5 mL -- and dispense this into a large measuring cup.

    Measure the amount of diluent required -- in our example, 28.5 mL -- and dispense this into the large measuring cup.

    Mix the solution with the glass stirring rod. You now have your 1:20 dilution solution.

    Things You'll Need

    • Graduated cylinder
    • Measuring cup
    • Glass stirring rod
    • Calculator

Related Articles

How to Make a 1% Sucrose Solution
How to Make a Five Percent Solution With Salt
How to Dissolve Magnesium Chloride
How do I Make 70 Percent Isopropyl Alcohol?
How to Find Mass Percentage
How to Calculate Average Volume
Conversion of PPM to Micromoles
How to: Improper Fractions Into Proper Fractions
How to Convert From Moles Per Liter to Percentage
How to Calculate Volume of a Rectangular Prism
How to Calculate a Percentage and Solve Percent Problems
How to Calculate Solubilities
How do I Calculate 0.1%?
How to Make Sodium Carbonate Solution
How to Divide Rational Numbers
How to Calculate Titratable Acidity
How to Calculate Moles
How to Convert ml to Ounces
How to Prepare Buffer Solutions

Dont Go!

We Have More Great Sciencing Articles!