[laxplayer]

40 mL of 0.100 M HCl and 10.0 mL of 0.220 M HCl

i have to find the concentration of each ion in the solution found by mixing these. i think i found the number of moles of both (.004 mol for the first one, .0022 for the second), but i dont understand how you can mix them if they are the same thing, and how you find the concentration. i think i need some help here :]

[Mitch]

How could the molarity be different then the ones they give you in the problem! 0.100 M and 0.220 M

[laxplayer]

oh, i meant the number of moles, but i still have no idea how to work out this problem

[enahs]

There is no chemical reaction going on here. Adding HCl to HCl just gives you more HCl.

How much H+ and Cl-, is there in the two different solutions? When you combine them, how much is in the combined solution? What is the total volume of the new solution? What is the definition of molarity?