[Chemistry] How do you find the new concentration?

[jkh4]

Homework Statement

For solution A the concentration is 7.00x10^-4 mol/L. You transfer 10ml of the solution A out into a 10 dram vial and add 10mL of 0.1M HCL acid solution, and the new mixture is called solution B. What is the concentration of solution B?

Homework Equations

The Attempt at a Solution

is this right approach? first find the mol of solution A, and then find the mol of HCl. Add them together and divided by the total volume.

Thanks.

 

[chemisttree]

I guess it would depend on if the HCl would react with the material in the stock solution.

 

[Blueshift5]

I would approach this problem by using the formula for dilution, which is C1V1 = C2V2. In this case, we know the initial concentration of solution A (C1) and its volume (V1), and we can calculate the final concentration of solution B (C2) by plugging in the volume of the new mixture (V2) and the concentration of the added HCl solution. This will give us the final concentration of solution B. Another way to approach this problem is by using the formula for molarity, which is moles of solute divided by liters of solution. In this case, we can calculate the moles of solution A and HCl, add them together, and then divide by the total volume to find the final concentration of solution B. Both approaches should give the same answer.