CHEM102 Lecture Notes - Lecture 14: Playstation 4, Buffer Solution, Conjugate Acid

• School: University of Alberta
• Department: Chemistry
• Course: CHEM102
• Professor: Yoram Apelblat

Document Summary

A sample exam is posted with solutions to be posted over the weekend. Cation anion acidic acidic neutral basic acidic ------ acidic ------ Rarely would the two effects exactly cancel each out. Find the ph of a 1m nh4i solution. I is derived from a very strong acid. Hi is a very strong acid and it immediately dissociates, Remember: ions derived from strong acids or strong bases have no effect on the ph of the solution. + is a weak acid and we need to consider its. + + h2o nh3 + h3o+ ka (nh4. Find the ph of 1 m solution of na2co3. +) = 5. 5 x 10 10 = x2 x2. [h3o+] = x = 5. 5 x 10 10 = 2. 35 x 10 5 m ph = log (2. 35 x 10 5) = 4. 63. % dissociation = x 100 = 0. 002% valid approx.