Answer:
The answer to your question is 1.8 liters (maybe we have to consider that there are 100 ml of the original solution so the volume of water will be 1.7 l)
Explanation:
Data
Volume 1 = 100 ml
Concentration 1 = 4.5 M
Concentration 2 = 0.25 M
Volume 2 = ?
Process
1.- Calculate the number of moles in solution 1
Molarity = moles/volume
-Solve for moles
moles = Molarity x volume
-Substitution
moles = 4.5 x 0.1
-result
moles = 0.45
2.- Calculate Volume 2
Volume = moles/concentration
-Substitution
Volume = 0.45 / 0.25
-Result
Volume = 1.8 l
3.- Conclusion
There must be added 1.8 l of water to the 4.5 solution
