Classroom Resources: Acids & Bases
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Buffers, pH | High School
Lab: Assessing the Alkaline Diet Using a Buffer System
In this lab, students will create a buffer that models the buffer system of human blood. They will then test the buffer system by adding lemon juice to simulate the consumption of acidic food. Analyzing the data collected in the lab will help students better understand the purpose of a buffer system. Additionally, students will evaluate the claim that the Alkaline Diet can make you healthier. This lab includes two student lab options—a general chemistry version, and an AP chemistry version.
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Titrations, Indicators, Accuracy, Dimensional Analysis, Error Analysis, Measurements, Significant Figures, Concentration, Redox Reaction, Reduction, Oxidation | High School
Lesson Plan: Vitamin C Quality Control
In this lesson, students will learn about a career in the skilled technical workforce, develop skills utilized in a quality control lab, and obtain data that may not have a clear “right answer.” For example, though many over-the-counter medications and vitamins state the amount of active ingredient, any individual tablet may have between 97 to 103% of the stated label claim. In addition, any products past the expiry date may have less due to potential decomposition. Students practice scientific communication by reporting their findings in a professional manner.
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Solubility, pH | High School
Lesson Plan: Investigating Ocean and Marine Algae
In this lesson, students will learn about coccolithophores, unicellular marine algae that inhabit the upper layer of the ocean. These phytoplankton form calcium carbonate, calcite, scales called coccoliths and are the biggest calcite producers in the ocean. First, students will observe photos of algal blooms of different types and analyze the photos for similarities and differences. Next, students will be introduced to types of marine algae including coccolithophores and to how ocean pH changes are impacting the availability of carbonate for use in the formation of calcite shells and coccoliths. Students will then plan and carry out a small-scale laboratory to investigate the relationship between the solubility of calcium carbonate and pH. To conclude, students will read an abstract of recent research into coccolithophores and ocean acidification and compare and contrast those findings with their own investigation’s results.
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Concentration, Precipitate, Molarity, Molality, Conductivity, Colligative Properties, Boiling Point Elevation, Freezing Point Depression, Distillation, Culminating Project, Graphing, Accuracy, Error Analysis, Interdisciplinary, Mixtures, pH, Buffers, Boiling Point, Freezing Point, Phase Changes | High School
Lesson Plan: Investigating Sea Water
In this lesson, students will consider their water footprint and means to obtain fresh water from seawater using a solar still. To understand the differences between fresh water and seawater, students will determine the composition of artificial seawater by using qualitative analysis to test for different ions in solution and calculate the molarity of different salts used in the recipe. Students will observe the effects of solutes in aqueous solutions by measuring conductivity and the freezing and boiling points of seawater and deionized water and determine total dissolved solids. In addition, students explore the buffering ability of seawater and the effect of carbon dioxide on its pH.
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Identifying an Unknown, Observations, Physical Change, Physical Properties, Chemical Change, Chemical Properties, Solubility, Precipitate, Indicators | High School
Lab: Using Qualitative Analysis to Identify Household Compounds
In this lab, students will be introduced to common laboratory techniques, safety procedures, lab reagents, and terminology, all while identifying unknown household substances. Students will learn how to use qualitative analysis techniques as a systematic way to identify unknown materials. As part of this process, they will practice careful observation and documentation, as well as identifying relevant physical and chemical properties and changes, including solubility, color change, gas formation, and precipitation of solids.
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pH, Indicators, Chemical Properties, Physical Properties, Identifying an Unknown | High School
Lab: Pigment pH Puzzles
In this lab, students will use their scientific detective skills to determine the identity of pigments used in various types of pH test strips based on how they each interact with several solutions of different pH values.
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pH, Indicators | Middle School, High School
Activity: Animation Activity: The pH Scale
In this activity, students will be introduced to the fundamentals of the pH scale and how it is used to distinguish between acids and bases. They will be shown everyday examples of acids and bases and where they fall on the pH scale. The logarithmic nature of the pH scale is explained, and universal indicator is introduced as a way of identifying the pH of a substance. There is also a brief overview of the chemistry of acids and bases.
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pH, Indicators | Middle School, High School
Animation: The pH Scale Animation
In this activity, students will be introduced to the fundamentals of the pH scale and how it is used to distinguish between acids and bases. They will be shown everyday examples of acids and bases and where they fall on the pH scale. The logarithmic nature of the pH scale is explained, and universal indicator is introduced as a way of identifying the pH of a substance. There is also a brief overview of the chemistry of acids and bases. **This video has no audio**
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Equilibrium Constants, Le Châtelier's Principle | High School
Activity: How do Pollutants Affect our Oceans?
In this activity, students will use the simulation, Surface Ocean pH Levels, from the Chemistry in Context Simulation Suite to investigate the values related to ocean acidification and interpret systems with multiple equilibria.
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Establishing Equilibrium, Equilibrium Constants, Reaction Quotient, Graphing | High School
Activity: Shaking Dice to Model Equilibrium Principles
In this activity, students work together in small groups using a variety of multi-sided dice to model the dynamic character of a chemical equilibrium. Students will collect, share and analyze data in order to understand that the rate of a chemical reaction depends on the concentration of reactants (and products) as modelled by the different sided dice.
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Review, Culminating Project, Mixtures, Separating Mixtures, Beer's Law, Concentration, Conductivity, Redox Reaction, Half Reactions, pH, Titrations, Buffers, Indicators, Ionic Bonding, Covalent Bonding, Alloys, Percent Composition, Le Châtelier's Principle, Enthalpy, Calorimetry | High School
Lesson Plan: AP Chemistry Experimental Evidence Review
In this lesson, students will evaluate data from 16 simulated lab experiments that were designed to mirror the Recommended Labs from the College Board. Corresponding lab experiments and demonstration options have also been included for teacher reference.
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Observations, Mixtures, Chemical Change, Physical Change, Chemical Change, pH | Elementary School
Demonstration: The Chemistry of Cheese
In this demonstration, students will observe the chemical process that occurs when making cheese. Students will be become more familiar with fundamental chemistry terms while making important observations.
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Activity Series, Chemical Change, Electrons, Electron Transfer, Balancing Equations, Chemical Change, Predicting Products, Observations, Acid Base Reactions | High School
Simulation: Metals In Aqueous Solutions
In this activity, students will run simulated tests of various metals in aqueous solutions to determine the relative reactivity of these metals. A total of eight metals will be observed in various combinations with the corresponding metal nitrate solutions and hydrochloric acid. Students will interpret the data collected to construct an activity series of the elements used in this simulation.
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Indicators, pH, Acid & Base Theories | High School
Lab: Odorants as pH Indicators
In this lab, students will observe how the aromas of common pantry items (vinegar, coffee, liquid aminos) change with pH, and relate these observations to their understanding of acid-base equilibrium.
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Classification of Reactions, Chemical Change, Balancing Equations, Acid Base Reactions, Combustion | Middle School, High School
Animation: Classifying Chemical Reactions Animation
In this animation, students will learn about some of the ways to classify different types of chemical reactions. It covers synthesis (combination), decomposition, single replacement (single displacement), double replacement (double displacement), combustion, and acid-base neutralization reactions. **This video has no audio**
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Classification of Reactions, Chemical Change, Balancing Equations, Acid Base Reactions | Middle School, High School
Activity: Animation Activity: Classifying Chemical Reactions
In this activity, students will learn about some of the ways to classify different types of chemical reactions. It covers synthesis (combination), decomposition, single replacement (single displacement), double replacement (double displacement), combustion, and acid-base neutralization reactions.
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Titrations, Acid Base Reactions, Molarity, Identifying an Unknown | High School
Lesson Plan: Investigating a Suspicious Drowning with Titrations
In this lesson, students take on the role of a forensic chemist who is tasked with investigating a suspicious drowning incident. Students will conduct a series of titrations on an evidence sample of water collected from the victim's lungs as well as on several water samples from local water sources (lakes, rivers, wells, etc.) Based on their findings, they will determine where the victim actually drowned.
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Chemical Change, Reaction Rate, Chemical Change, Exothermic & Endothermic, Heat, Temperature | High School
Lab: A Comparison of Two Chemical Reactions
In this lab, students will perform two chemical reactions, one between acetic acid and sodium bicarbonate and the other between the citric acid and the sodium bicarbonate in an Alka-Seltzer tablet when dissolved in water. Both reactions will produce gas while reacting in a closed plastic sandwich bag, causing it to inflate. Students will observe the reactions and analyze the results in order to understand indicators of chemical changes, heat flow, and factors that affect reaction rates
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pH, Acid Base Reactions, Acid & Base Theories, Strong vs Weak, History | Middle School, High School
Activity: What are Acids & Bases? Video Questions
In this lesson, students will watch a video and answer questions about acids and bases. They will learn about characteristics of acids and bases, the pH scale, and the role of acids in biochemistry.
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Concentration, Physical Properties, Chemical Properties, pH | Middle School
Activity: Would You Drink it?
In this activity, students are provided with data regarding the water quality at multiple locations throughout a city. Students will determine which location should be prioritized for cleaning of contaminates. Students will utilize Claim Evidence and Reasoning (CER) to develop a claim that is supported by the data provided.
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Acid & Base Theories, Strong vs Weak, Indicators, Titrations, Buffers, Concentration, Molarity, Net Ionic Equation | High School
Lesson Plan: Acids and Bases Unit Plan
The AACT high school classroom resource library and multimedia collection has everything you need to put together a unit plan for your classroom: lessons, activities, labs, projects, videos, simulations, and animations. We constructed a unit plan using AACT resources that is designed to teach the topic of acids and bases to your students.
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Redox Reaction, Oxidation, Half Reactions, Oxidation Number, Titrations, Stoichiometry, Reduction | High School
Lesson Plan: Redox Reactions & Titrations
This lesson students will review oxidation states, half-reactions, balancing reactions and understand how to complete calculations and perform a redox titration.
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Chemical Change, Chemical Change, Acid Base Reactions, Observations | Middle School, High School
Lab: How do Sinkholes Form?
In this lab students will learn how acidic groundwater reacts with limestone, causing it to erode. Sinkholes form when eroded limestone underneath the surface of the earth can no longer support the ground above it. Students will test how acid reacts with a variety of rocks and determine which rocks would be best to build a city on top of in order to reduce the chance of sinkholes forming.
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Acid & Base Theories, Strong vs Weak, History | Middle School, High School
Activity: Acid & Base Guys Video Questions
In this activity, students will watch a video about the history of acids and bases. They will learn about the evolution of these theories, from Lavoisier to Arrhenius, Bronsted-Lowry, and Lewis.
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Chemical Change, Chemical Change, Physical Change, Observations, Indicators | Elementary School
Lesson Plan: Explorations of Baking Soda and Vinegar
In this lesson, students complete a series of simple lab experiments to better understand chemical reactions as well as differentiate between chemical change and physical change. Students will also be introduced to the pH scale, and have the opportunity to understand how chemical reactions can be used in real-world scenarios.