Calculate the ph of a solution obtained by mixing 100ml each of 0.1m hcl, 0.1m hno3 and 0.1m naoh solutions.

Given:

Volume of each of the solutions = 100 mL of each
Concentration of HCl = 0.10 M
Concentration of HNO3 = 0.10 M
Concentration of NaOH = 0.10 M

If all are mixed in one solution, the pH will surely be low since there are two acids mixed with one base. The pH range should be 1 - 5. 

you've just posted only 1 question and the answer for that is option C.

thanks!