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June 10, 2013
AGENDA:1 – Bell Ringer2 – Announcements 3 – CN: Calculating
pH and pOH4 – “We Do”
Homework Examples
5 – “You Do” Homework Work Time
Today’s Goal:Students will be able to calculate pH and pOH of solutions.Homework1. Calculating pH & pOH
HW2. Week 38 Work (and ALL
WORK) is due by Friday!
3. Make up Week 38 Quiz by Thursday (so you can have quizzes back Friday as Study Guides)
4. Final Exams = next Mon/Tue
Monday, June 10
Objective: Students will be able to calculate pH and pOH of solutions.
Bell Ringer:Write the equation for the ionization of water.(In other words: What two ions does water break up into?)
(Fill in the balanced chemical equation below.)
H2O _____ + _____ (acid) (base)
5 minutes!
4 MINUTES REMAINING…
Monday, June 10
Objective: Students will be able to calculate pH and pOH of solutions.
Bell Ringer:Write the equation for the ionization of water.(In other words: What two ions does water break up into?)
(Fill in the balanced chemical equation below.)
H2O _____ + _____ (acid) (base)
4 minutes!
3 MINUTES REMAINING…
Monday, June 10
Objective: Students will be able to calculate pH and pOH of solutions.
Bell Ringer:Write the equation for the ionization of water.(In other words: What two ions does water break up into?)
(Fill in the balanced chemical equation below.)
H2O _____ + _____ (acid) (base)
3 minutes!
2 MINUTES REMAINING…
Monday, June 10
Objective: Students will be able to calculate pH and pOH of solutions.
Bell Ringer:Write the equation for the ionization of water.(In other words: What two ions does water break up into?)
(Fill in the balanced chemical equation below.)
H2O _____ + _____ (acid) (base)
2 minutes!
1minute Remaining…
Monday, June 10
Objective: Students will be able to calculate pH and pOH of solutions.
Bell Ringer:Write the equation for the ionization of water.(In other words: What two ions does water break up into?)
(Fill in the balanced chemical equation below.)
H2O _____ + _____ (acid) (base)
1 minute!!!
30 Seconds Remaining…
Monday, June 10
Objective: Students will be able to calculate pH and pOH of solutions.
Bell Ringer:Write the equation for the ionization of water.(In other words: What two ions does water break up into?)
(Fill in the balanced chemical equation below.)
H2O _____ + _____ (acid) (base)
30 seconds!!!
BELL-RINGER TIME IS
UP!
June 10, 2013
AGENDA:1 – Bell Ringer2 – Announcements 3 – CN: Calculating
pH and pOH4 – “We Do”
Homework Examples
5 – “You Do” Homework Work Time
Today’s Goal:Students will be able to calculate pH and pOH of solutions.Homework1. Calculating pH & pOH
HW2. Week 38 Work (and ALL
WORK) is due by Friday!
3. Make up Week 38 Quiz by Thursday (so you can have quizzes back Friday as Study Guides)
4. Final Exams = next Mon/Tue
Week 39 -- 2 More Weeks!
Weekly Agenda
Monday 6/10 – CN: Calculating pH and pOH
Tuesday 6/11 – CN: pH Indicators
Wednesday 6/12 – Demos or Lab
Thursday 6/13 – REVIEW for EXAM
Friday 6/14 – REVIEW for EXAM
Monday, June 10
Objective: Students will be able to calculate pH and pOH of solutions.
Bell Ringer:Write the equation for the ionization of water.(In other words: What two ions does water break up into?)
(Fill in the balanced chemical equation below.)
H2O _____ + _____ (acid) (base)
REVIEW
CHAMPS for June 10, 2013
C – Conversation – Notes = No TalkingH – Help – RAISE HAND for questionsA – Activity – Cornell Notes:
Calculating pH and pOHM – Materials and Movement –
Pen/Pencil, Chem Notebook, Calculator
P – Participation – Complete your notes to be able to answer Practice Problems.
S – Success – Complete Practice Problems to prepare for next week’s exam!
Date: 6/10/13Topic: Calculating pH and pOH
pH = Potential Hydrogen
Measures amount of H+ ions in a solution to determine how acidic or basic a solution is
Can’t directly measure pH of basic solutions
What is pH?
Date: 6/10/13Topic: Calculating pH and pOH
When calculating pH, we use the log function
Log is a function that turns really big or really small numbers into integers (numbers) between 1-10
Ex: Scales the size of the galaxy into size of Harlan
What is a log function?
Date: 6/10/13Topic: Calculating pH and pOH
pH = -log [H+]
EXAMPLE:What is the pH of 0.045M
HBr?
[HBr] = [H+] = [0.045M]pH = -log[0.045]
pH = 1.35
How do you calculate pH for acids?
Date: 6/10/13Topic: Calculating pH and pOH
1. Calculate pOH:pOH = -log[OH-]
2. Then calculate pH:pH + pOH = 14
So: pH = 14 - pOH
How do you calculate pH for bases?
Date: 6/10/13Topic: Calculating pH and pOH
EXAMPLE:What is the pH of 1.2x10-3
M NaOH?
[NaOH] = [OH-] = 1.2x10-3
MpOH = -log[1.2x10-3]
pOH = 2.92pH = 14 - 2.92
pH = 11.1
How do you calculate pH for bases?
