Problem Set 5

Problem Set 5 - Chem 215 Fall 2007 Problem Set 5 Due Friday...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Chem 215, Fall 2007 Problem Set 5 Due Friday, Sept 28, 2:00 PM Name: ________________________ Student TA Name: ____________________Lab Day: ____________ Suggested Additional Problems- Ch 8:17, 21, 27, 33, 41, 49, 55, 69 1. A buffer solution contains 0.35M NH 3 and 0.50M NH 4 Cl. In this problem, you will use three different methods to determine the pH of the buffer solution. a) Set up an ICE table for the following base equilibrium in order to calculate [OH - ]. Then compute the pH: N H 3 (aq) + H 2 O(l) NH 4 + (aq) + OH - (aq) K b = 1.8 x 10 -5 b) Alternatively, you can set up an ICE table for the acid equilibrium reaction. In this case, you need to calculate K a for NH 4 + using K b for NH 3 : NH 4 + (aq) + H 2 O(l) NH 3 (aq) + H 3 O + (aq) c) Now use the Henderson-Hasselbalch equation to calculate the pH of the buffer solution.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Chem 215, Fall 2007 Problem Set 5 Due Friday, Sept 28, 2:00 PM d) Calculate the pH of the solution that results when 0.15 mol of gaseous HCl is added to 2.0 L
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

Problem Set 5 - Chem 215 Fall 2007 Problem Set 5 Due Friday...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online