Answer to Question #113510 in General Chemistry for Jonathan Jacques Pluviose

Question

If there are 0.045 mols of NH3 in 23.6 mL of solution, what is its concentration? Also,
what is the pH?
10.)

Answer 1

Molar concentration = n(NH3)/V(solution) = 0.045mol/0.0236L = 1.907 mol/L

NH3 + H2O = NH4+ + OH-

C(OH-) = 1.907 M

pOH = - lg[OH-]

pH = 14 - pOH