How can you prepare 100.0 ml of 0.400 m cacl2 from a stock solution of 2.00 m cacl2.

Use the dilution equation to calculate the volume of the stock solution required.

Stock solution volume required is 20.0 mL.

Add water to concentrated solution to reach the desired volume.

The volume of water to add is 80.0 mL.

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because it does not have the potential to be entirely used up

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