june 10, 2013 agenda: 1 – bell ringer 2 – announcements 3 – cn: calculating ph and poh 4 –...

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?