Mixing equal volumes of `0.1MCa(NO_(3))_(2)` and `AgF` solution results in:

Equal volumes of 0.1 MAgNO_(3) and 0.1 M NaCl solutions are mixed. The concentration of NO_(3)^(-) in the mixed solution is

Equal volumes of 0.1 M AgNO_(3) and 0.2 M NaCl solutions are mixed. The concentration of nitrate ions in the resultant mixture will be

What is the pH of the resulting solution when equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed?