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.
