C1V1 = C2V2

Where:

C1 = Concentration of the stock solution

V1 = Volume of the stock solution

C2 = Concentration of the working solution

V2 = Volume of the working solution

The relationship between the volumes and concentrations involved is that of

an inverse proportion; that is, when the volume of one solution is greater, the

concentration of the solution of greater volume is less.

a. **Basic Rules for Solving C**1V1 = C2V2 Problems.

(1)

Three of the 4 values must be known.

(2)

The units of volume and concentration must be the same respectively.

(3) It is crucial that the volume and concentration that relate to one another

are identified.

(4)

Any unit of volume or concentration may be used.

b. **Example 1**. How much 30.03.0

Solution. Read the problem carefully and determine the relationship that will

allow you to determine the unknown quantity.

C1V1 = C2V2

Ensure that the concentration and volume units are the same respectively.

Using the appropriate expression, substitute the given values.

C1V1 = C2V2

(30.0

MD0837

6-6

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