Acid/Base Station Review: Titration Calculation Notes and Demo

Acid/Base Station ReviewTitration Calculation Notes and Demo

Objective: • Today I will be able to: • Define an acid and base using the arrhenius and lewis definitions • Determine the pH of a household substance using indicators • Calculate the pH and pOH of a solution using pH scale calculations • Correctly name acids and bases • Calculate the concentration of an unknown acid by using titration • Evaluation/Assessment: • Informal assessment – student interactions at the stations • Formal assessment – analyzing student responses to the stations and exit ticket • Common Core Connection • Demonstrate Independence • Build Strong Content Knowledge • Make sense of problem and persevere in solving them • Reason abstractly and quantitatively • Use appropriate tools strategically • Attend to precision

Lesson Sequence • Evaluate: Warm-Up • Elaborate: Acid/Base Station Gallery Walk • Evaluate: Acid/Base Review • Engage and Explore: Titration Demo • Explain: Titration Calculation Notes • Elaborate: Titration Calculation Practice • Evaluate Exit Ticket

Warm Up • Name the following acids and bases • HCl • H2SO4 • NH3 • H2SO3 • KOH

Objectives • Today I will be able to: • Define an acid and base using the arrhenius and lewis definitions • Determine the pH of a household substance using indicators • Calculate the pH and pOH of a solution using pH scale calculations • Correctly name acids and bases • Calculate the concentration of an unknown acid by using titration

Homework • Wear Closed Toe Shoes for Lab • B-Day (Thursday) • A-Day (Friday)

Agenda • Warm-Up • Acid/ Base Station Gallery Walk • Acid/Base Station Review • Titration Demo • Titration Calculation Notes • Titration Calculation Practice • Exit Ticket

Acid/Base Station Gallery Walk Travel to each station and check your answers (15 minutes to complete)

Acid/Base Review Game Find a partner. Get 1 whiteboard and 1 marker per partner. Answer the questions on the whiteboard. Each correct answer scores 1 point.

Properties of Acids and Bases Station 1 Questions

1. True or False • Bases taste sour • False • (Acids taste Sour)

2. True or False • Acids make blue litmus paper turn red • True • Bases also turn red litmus paper blue

3. True or False • Thinking of Acid, Base and Neutral substances…Only acids act as electrolytes and conduct an electrical current • False • Both acids and bases are electrolytes

4. True or False • Bases react with metals to form hydrogen gas • False • Acids react with metals to form hydrogen gas

5. True or False • Acids and bases neutralize each other when they react. This process destroys the properties of the acid and base. • True

Indicators Station 2 Questions

1. True or False • The indicator phenolphthalein turns pink in a basic solution. • True

2. True or False • An indicator usually changes color over a pH range. • true

3. True or False • All indicators are liquid. • False

4. True or False • Some fruits and flowers can be used as indicators. • True

5. True or False • A universal indicator is a blend of pH indicator solutions designed to identify the pH of a solution over a wide range of values. • True

Litmus Paper Testing Station 3 Questions

1. True or False • Litmus paper that changes from blue to red in a solution indicates that the solution is neutral. • False • Blue to red indicates an acidic solution.

2. True or False • Orange juice is a solution that might change litmus paper from blue to red. • True • Orange juice is acidic.

3. True or False • Blue litmus paper that changes to red shows that the solution has a pH of 3. • False • Litmus paper does not show pH values.

4. True or False • Cleaner with ammonia is a solution that might change litmus paper from blue to red. • False • Cleaner with ammonia is basic. It changes red litmus paper to blue.

5. True or False • Red litmus paper that changes to a wet red color indicates that the solution is basic. • False • Red litmus paper changes to blue in the presence of a base.

pH Scale Station 4 Questions

1. True or False • Bases have higher pH values than acids on the pH scale. • True

2. True or False • Hydronium ions can be written as H2O+ • False • Hydroniums ions are written as H3O+

3. True or False • The equation to determine pH is pH = log[H+] • False • pH = - log[H+]

4. True or False • pH can be converted into a pOH value by using the equation pH + pOH = 14 • True

5. True or False • pH can be written as H+ ions or H3O+ ions. • True

Arrhenius vs Bronsted Lowry Acids and Bases Station 5 Questions

1. True or False • An Arrhenius acid is a substance that when added to water increases the number of OH- ions in the water. • False • Arrhenius acids increase the number of H+ ions in the water.

2. True or False • According to the Bronsted Lowry theory, an acid is a "proton donor" and a base is a "proton acceptor.” • True

3. True or False • NaOH is an example of an Arrhenius base. • True

4. True or False • HF is an Arrhenius acid. • True

5. True or False • NaOH is an example of an Arrhenius, and a Bronsted Lowry, base. • False

pH Paper Testing Station 6 Questions

1. True or False • pH paper turns red or blue. • False • pH paper can change a variety of colors.

2. True or False • A neutral substance has a pH of 7. • True

3. True or False • An acidic substance can have a pH of 6. • True

4. True or False • A basic substance can have a pH of 5. • False

5. True or False • pH paper dipped into a substance shows results as a color change and a numerical value. • True

Acid Naming Station 7 Questions

1. True or False • If the anion of an acid ends in “ide” you name the acid hydro____ ic acid. • True

2. True or False • If the anion of an acid ends in “ite” you name the acid _______ ic acid. • False • Anions that end in “ate” are named ____ ic acid

3. What is the Acid Name? • HF • Hydrofluoric acid

4. What is the Acid Name? • HNO2 • Nitrous acid

Acid/Base Station Review: Titration Calculation Notes and Demo