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How can a student prepare a 100 mL of 0.0400 M potassium dichromate from 0.200 M potassium dichromate?​

Sagot :

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Take 20 ml of the original solution and make up to the 100ml mark.

Using the dilution formula;

C1V1 = C2V2

C1 = concentration of the original solution

V1 = volume of original solution

C2 = concentration of new solution

V2 = volume of new solution

Now, the volume of the original solution that must be taken to prepare the new solution is V1;

V1 = C2V2/C1

V1 = 0.0400 ×  100/0.200

V1 = 20 ml

Hence, you need to take 20 ml of the original solution and make up to the 100ml mark.

Learn more: https://brainly.com/question/1527403

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