Answer to Question #96236 in General Chemistry for Mckenzie Wallace

Question

1. In the laboratory you dissolve 15.9 g of sodium nitrate in a volumetric flask and add water to a total volume of 250 mL.

What is the molarity of the solution? M.

What is the concentration of the sodium cation? M.

What is the concentration of the nitrate anion? M.

2. In the laboratory you dissolve 19.4 g of ammonium fluoride in a volumetric flask and add water to a total volume of 250 mL.

What is the molarity of the solution? M.

What is the concentration of the ammonium cation? M.

What is the concentration of the fluoride anion? M.

Answer 1

1) 15.9/85= 0.187058824 moles.

0.187058824/0.25 = 0.748235296 M.

Na+= 0.748235296 .

NO3-=0.748235296.

2) 19.4/33= 0.587878788 moles.

0.587878788/ 0.25= 2.35151515 M.

NH4+=2.35151515 M.

F-=2.35151515 M.