June 10, 2013 AGENDA: 1 – Bell Ringer 2 – Announcements 3 – CN: Calculating pH and pOH 4 – “We Do” Homework Examples 5 – “You Do” Homework Work Time Today’s.

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Presentation transcript:

June 10, 2013 AGENDA: 1 – Bell Ringer 2 – Announcements 3 – CN: Calculating pH and pOH 4 – “We Do” Homework Examples 5 – “You Do” Homework Work Time Today’s Goal: Students will be able to calculate pH and pOH of solutions. Homework 1. Calculating pH & pOH HW 2. 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.) H 2 O  _____ + _____ (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.) H 2 O  _____ + _____ (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.) H 2 O  _____ + _____ (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.) H 2 O  _____ + _____ (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.) H 2 O  _____ + _____ (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.) H 2 O  _____ + _____ (acid) (base) 30 seconds!!!

BELL- RINGER TIME IS UP!

June 10, 2013 AGENDA: 1 – Bell Ringer 2 – Announcements 3 – CN: Calculating pH and pOH 4 – “We Do” Homework Examples 5 – “You Do” Homework Work Time Today’s Goal: Students will be able to calculate pH and pOH of solutions. Homework 1. Calculating pH & pOH HW 2. 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 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.) H 2 O  _____ + _____ (acid) (base) REVIEW

CHAMPS for June 10, 2013 C – Conversation – Notes = No Talking H – Help – RAISE HAND for questions A – Activity – Cornell Notes: Calculating pH and pOH M – 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: 6/10/13 Topic: 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: 6/10/13 Topic: 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: 6/10/13 Topic: 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: 6/10/13 Topic: 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: 6/10/13 Topic: Calculating pH and pOH EXAMPLE: What is the pH of 1.2x10 -3 M NaOH? [NaOH] = [OH - ] = 1.2x10 -3 M pOH = -log[1.2x10 -3 ] pOH = 2.92 pH = pH = 11.1 How do you calculate pH for bases?