CHM 2046 Lecture Notes - Lecture 17: Buffer Solution, Sodium Chloride, Sodium Hydroxide

23 views3 pages
user avatar
Published on 19 Jul 2019
School
University of Florida
Department
Chemistry
Course
CHM 2046
Did the PLA at like walmart basically…so answers still below just no explanation
Question 1
1 / 1 pts
Which of the following combinations produce a buffer solution? Select all that apply.
HNO2 and KNO2
HOCl and NaCl
HF and NaF
H2SO4 and Na2SO4
HClO4 and NaClO4
NH3 and (NH4)2SO4
HCN and LiCN
Question 2
1 / 1 pts
Look at sample problem 19.1 in the 8th ed Silberberg book. Write the equation for
the acid dissociation, write the Ka expression, solve for H+ concentration, then do an
ICE chart. Put the values into the Kaexpression (the one you solved for H+ and find
H+, convert to pH and input that to 2 decimal place. Or use the Henderson-
Hasselbalch
equation:
Calculate the pH of a buffer solution consisting of 0.31 M HA (Ka = 7.1 x 10-6) and
0.25 M NaA.
5.06
Question 3
1 / 1 pts
Unlock document

This preview shows page 1 of the document.
Unlock all 3 pages and 3 million more documents.

Already have an account? Log in