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Hydrochloric acid is purchased in 12 molar concentrations. If I needed 200 ml of 2.0 molar HCl, how many milliliters of the concentrated solution would I need

Respuesta :

joseaaronlara

Answer:

The answer to your question is 33.3 ml

Explanation:

Data

Stock solution 12M

Volume 2 = 200 ml

Concentration 2 = 2 M

Volume stock = ?

Process

1.- Use the formula for dilutions

                               C1V1 = C2 V2

- Solve for V1

                               V1 = C2V2 / C1

2.- Substitution

                               V1 = (2)(200) / 12

- Simplification

                               V1 = 400 / 12

3.- Result

                               V1 = 33.3 ml

4.- Conclusion

We need 33.3 ml of the concentrated solution.