Chemistry of Solutions
You are asked to prepare 30 ml of a 2 M solution of HNO3 from a stock solution of 10 M solution of HNO3. How much of the stock solution is required to make this 30 ml of 2 M HNO3 solution?
(Molarity of solution made x Volume of solution made) is equal to (Molarity of the stock solution x Volume of the stock solution required). With this in mind, let's plug in the values that we know.
2 M x 30 ml = 10 M x Volume of the stock solution required
We need not convert the milliliters into liters for this problem, because the molar units will cancel out.