May 3, 2018 pH and concentration Acid base Learning Target: I can can Identify properties of acids and bases and determine the products of neutralization reactions through examples

Do Now (4 min) May 3, 2018 Learning target: I can Apply my understanding of pH of acids and bases to the strength and concentration of H+ ions Do Now: (Answer on your Do Now Sheet) Which is more acidic: pH of 2 or pH of 5? Learning Target: I can can Identify properties of acids and bases and determine the products of neutralization reactions through examples

Read and annotate May 3, 2018 Independently Read and answer From the top of the page to the EXAMPLE Learning Target: I can can Identify properties of acids and bases and determine the products of neutralization reactions through examples

pH range May 3, 2018 pH range: _____________ Acidic pH range: _______ Neutral pH: ______ Basic pH range: _______ Learning Target: I can can Identify properties of acids and bases and determine the products of neutralization reactions through examples

Ph notes May 3, 2018 When a species has a LOW pH, it is ____________________________. We know that something that is ACIDIC releases or donates H+ ions, so an ACIDIC solution has a ____________ concentration of H+ ions. When a species has a HIGH pH, it is ____________________________. We know that something that is BASIC releases OH- or absorbs H+ ions, so a BASIC solution has a ___________ concentration of H+ ions and a ____________ concentration of OH- ions . When a species has a pH = 7, it is ____________________________. We know that something that is NEUTRAL has an equal amount of H+ ions and OH- ions , so a NEUTRAL solution is neither ______________ nor _______________. Learning Target: I can can Identify properties of acids and bases and determine the products of neutralization reactions through examples

Example – all together! May 3, 2018 A. A solution with a pH = 3 has a concentration of 10-3 M H+. What is 10-3 as a decimal? ________ B. A solution with a pH = 2 has a concentration of __________ M H+. What is that as a decimal? ________ C. Take a closer look at the solution above that decreased in pH1 from pH=3 to pH=2. a. Did the solution become more acidic or more basic? __________________________________ b. How did the concentration change? By what FACTOR? _________________________________ D. Complete the following: When the pH decreases by 1, the concentration (increases / decreases) by a factor of _________ . Learning Target: I can can Identify properties of acids and bases and determine the products of neutralization reactions through examples

Try it! - PAIRS May 3, 2018 A solution with a pH of 8 increases to a pH of 9. What happens to the concentration of H+ ions? A. A solution with a pH = 8 has a concentration of _________ M H+. What is that as a decimal? _______ B. A solution with a pH = 9 has a concentration of __________ M H+. What is that as a decimal? ________ C. Did the solution become more acidic or more basic? ____________________ D. How did the concentration change? By what FACTOR? __________________ Learning Target: I can can Identify properties of acids and bases and determine the products of neutralization reactions through examples

Increase or decrease in concentration? By what factor? Pair work - tables May 3, 2018 Initial pH Initial [ H3O+ ] Final pH Final [ H3O+ ] Increase or decrease in concentration? By what factor? 3   4 1 x 10–4 M 5 1 x 10-2 M Learning Target: I can can Identify properties of acids and bases and determine the products of neutralization reactions through examples

PAIR work May 3, 2018 In PAIRS: Work on the problems on PAGE 2 1. A. Write the equation for the dissolution of hydrochloric acid. B. Find the pH of a 1 x 10-6 M hydrochloric acid solution. 2. A. Write the equation for the dissociation of sulfuric acid. B. Find the pH of a solution that contains 0.98 g of H2SO4 dissolved in 1 liter of solution. Learning Target: I can can Identify properties of acids and bases and determine the products of neutralization reactions through examples

Pair work May 3, 2018 3. When the pH of a solution is changed from 4 to 3, the hydronium ion concentration of the solution a) decreases by a factor of 10 b) increases by a factor of 10 c) decreases by a factor of 100 d) increases by a factor of 100 4. When the hydronium ion concentration of a solution is increased by a factor of 10, the pH value of the solution a) decreases 1 pH unit b) decreases 10 pH units c) increases 1 pH unit d) increases 10 pH units 5. Some carbonated beverages are made by forcing carbon dioxide gas into a beverage solution. When a bottle of one kind of carbonated beverage is first opened, the beverage has a pH value of 3. After the beverage bottle is left open for several hours, the hydronium ion concentration in the beverage solution decreases to 1/1000 of the original concentration. Determine the new pH of the beverage solution. 6. A solution with a pH of 2.0 has a hydronium ion concentration ten times greater than a solution with a pH of a) 1.0 b) 0.20 c) 3.0 d) 20. Learning Target: I can can Identify properties of acids and bases and determine the products of neutralization reactions through examples

Independent work May 3, 2018 7. Come up with two sample problems testing aspects of the acid/base units. One multiple choice and one free response. Your questions may end up on your test if they’re well-written. Multiple choice: Free Response: Learning Target: I can can Identify properties of acids and bases and determine the products of neutralization reactions through examples

May 3, 2018 Exit ticket (3 min) EXIT TICKET: Complete on a separate sheet of paper How does the concentration change when an HNO3 solution is diluted from a pH of 2 to a pH of 5? Learning Target: I can can Identify properties of acids and bases and determine the products of neutralization reactions through examples