Dilution Chemistry Example 1

Follow the full solution, then compare it with the other examples linked below.

Example 1

easy
How much water must be added to 100 mL100\,\text{mL} of 6.0 M HCl6.0\,\text{M HCl} to make a 1.0 M1.0\,\text{M} solution?

Solution

  1. 1
    Use M1V1=M2V2M_1V_1 = M_2V_2: 6.0×100=1.0×V26.0 \times 100 = 1.0 \times V_2.
  2. 2
    V2=600 mLV_2 = 600\,\text{mL}.
  3. 3
    Water to add =600−100=500 mL= 600 - 100 = 500\,\text{mL}.

Answer

500 mL of water500\,\text{mL of water}
Dilution does not change the number of moles of solute — it only increases the total volume. The dilution equation M1V1=M2V2M_1V_1 = M_2V_2 reflects this conservation.

About Dilution

The process of decreasing the concentration of a solution by adding more solvent while keeping the total amount of solute constant.

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More Dilution Examples

Example 2 medium

A stock solution of [formula] is [formula]. What volume is needed to prepare [formula] of [formula]

Example 3 easy

You dilute [formula] of [formula] to a final volume of [formula]. What is the new concentration?

Example 4 easy

How much [formula] hydrochloric acid is needed to prepare [formula] mL of [formula] HCl?

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Related Concepts

ConcentrationTitration