First thing first, calculate the total volume of the resulting solution
Now, you are dealing with two strong acids that ionize completely in aqueous solution. Both nitric acid and hydrochloric acid produce hydronium cations in #1:1# mole ratios, so you know that
As you know, molarity is defined as the number of moles of solute present in #10^3# #"mL"# of solution. For the nitric acid solution, you have
For hydrochloric acid, you have
The total number of moles of hydronium cations delivered by the two acids in the resulting solution will be
The concentration of the hydronium cations in the resulting solution will be
As you know, you have
This will give you
The answer is rounded to two decimal places, the number of sig figs you have for the molarities of the two acids. As a fun fact, a mixture of nitric acid and hydrochloric acid is called aqua regia. Ideally, aqua regia contains nitric acid and hydrochloric acid in a #1:3# mole ratio, not in a #1:1# mole ratio like you have here. |