Classroom Resources: Solutions
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Acid & Base Theories, Concentration  High School
Lesson Plan: Calculating pH, A Look at Logarithms Mark as Favorite (52 Favorites)
In this lesson, students will be introduced to a base10 logarithmic scale and use it to calculate pH from hydrogen ion concentration. Often students are able to calculate pH by pushing the correct buttons on their calculators, but they don’t understand what the values mean. This lesson attempts to bridge that gap using a guided inquiry model.

Molarity, Concentration, Molality  High School
Activity: Particle Level Molarity Mark as Favorite (83 Favorites)
In this activity, students are introduced to molarity at the particle level. Students will activate their prior knowledge by demonstrating their understanding of concentration by preparing several KoolAid drinks, and then applying that information at the particle level to various models.

Concentration, Beer's Law, Electromagnetic Spectrum  High School
Lesson Plan: Using Color to Identify an Unknown Mark as Favorite (14 Favorites)
In this lesson students will utilize spectrophotometry to identify the wavelength of maximum absorbance for a food dye. They will also generate a Beer's Law Standard Curve, and utilize their skills to identify the different dyes and their concentrations in an unknown mixture. The lesson culminates with an extension to utilizing a similar method in color matching paint.

Beer's Law, Concentration, Physical Properties  High School
Lesson Plan: Introduction to Color Mark as Favorite (18 Favorites)
In this lesson students explore the properties related to color and how those properties vary with changes in concentration. This lesson introduces the use of a spectrophotometer to measure wavelength and absorbance in colored solutions as well as the use of Beer’s Law to determine an unknown concentration.

Chemical Change, Beer's Law, Redox Reaction, Reduction, Oxidation, Concentration, Reaction Rate  High School
Lesson Plan: Rustbusters! A Lab Activity on Corrosion Mark as Favorite (12 Favorites)
In this lesson students learn about factors affecting the rate of corrosion and evaluate the efficiency of different protective coatings to simulate products used in industry when building metal structures like ships or bridges.

Le Châtelier's Principle, Reversible Reactions, Concentration  High School
Lab: Le Chatelier’s Soda Mark as Favorite (83 Favorites)
In this lab, students will observe how the equilibrium of a chemical reaction is affected when a change in pressure, temperature, and concentration is applied to the system.

Titrations, Indicators, Molarity, Concentration  High School
Demonstration: How to Perform a Titration Mark as Favorite (35 Favorites)
In this demonstration, the teacher will show how a titration is setup and performed. Also, the teacher will utilize different indicators to show how they work and why they are necessary. At the end of the demonstration, the teacher will also explain how to calculate the molarity of the unknown substance.

Beer's Law, Molarity, Concentration  High School
Lab: Beer's Law Discovered Mark as Favorite (30 Favorites)
In this laboratory investigation, students will explore the concepts of light absorption, transmittance, and the relationship between absorbance, path length, and concentration of solution.

Concentration, Mixtures, Interdisciplinary, Scientific Method, Measurements  Middle School, High School
Lab: Effect of Salt Concentration on Plants Mark as Favorite (9 Favorites)
In this lab, students will observe how salt concentration can affect the structure of a potato tuber.

Molarity, Concentration, Mole Concept  High School
Demonstration: What Is a 1 Molar Solution? Mark as Favorite (33 Favorites)
In this demonstration, students will determine the molarity of several different solutions demonstrated by the teacher.

Limiting Reactant, Percent Yield, Stoichiometry, Balancing Equations, Net Ionic Equation, Concentration, Molarity, Precipitate, Solubility, Dimensional Analysis, Mole Concept, Observations, Graphing, Separating Mixtures, Identifying an Unknown  High School
Lab: White Lab Mark as Favorite (48 Favorites)
In this lab, students use molarity concepts to review limiting reactant concepts mathematically, conceptually, and graphically. They can then carry out a follow up investigation to identify an unknown using concepts learned in the first investigation.

Calorimetry, Exothermic & Endothermic, Temperature, Stoichiometry, Limiting Reactant, Chemical Change, Molarity, Enthalpy, Heat, Concentration, Experimental Design, Scientific Method  High School
Lab: Less Than Zero Mark as Favorite (33 Favorites)
In this lab, students will investigate the endothermic reaction between baking soda and HCl. Students will consider stoichiometric ratios, molar concentrations, reaction scale, and calorimetry. The lab starts with a scripted reaction that uses given molar ratios, a glass beaker, and 2M HCl. They will witness a temperature drop of about 5 to 8 C. Students then adjust the experiment so they can achieve a temperature drop of more than 20 C.

Titrations, Concentration, Indicators, Acid Base Reactions, Equivalence Point, Molarity  High School
Lab: Lethal Dose Mark as Favorite (34 Favorites)
In this lab, students will perform several titrations to calculate the concentration of potentially “lethal” medicycloprophic solutions.

Molarity, Concentration, Saturated/Unsaturated/Supersaturated, Mole Concept, Dimensional Analysis, Stoichiometry, Balancing Equations  High School
Lab: KoolAid Mark as Favorite (67 Favorites)
In this lab, students calculate grams of KoolAid powder required to make 3 different solutions of KoolAid (using the molar mass of sugar) with the following concentrations: 0.2 M, 0.5 M, and 1.0 M. Determine the concentration of properly prepared KoolAid through a taste test.

Titrations, Acid Base Reactions, Indicators, Chemical Change, Stoichiometry, Balancing Equations, Concentration, Molarity, Error Analysis, Dimensional Analysis, Measurements  High School
Lab: Vinegar Quality Control Mark as Favorite (38 Favorites)
In this lab, students will perform a titration of a vinegar sample to determine if it is it close to the concentration claimed on the bottle.

Colligative Properties, Specific Heat, Freezing Point Depression, Solute & Solvent, Concentration, Heat, Temperature, Calorimetry, Error Analysis  High School
Lesson Plan: The Hot and Cold of it All Mark as Favorite (13 Favorites)
In this lesson students will analyze the effectiveness of different brands of antifreeze/coolants and their ability to protect an engine in cold climates. Students will conduct a lab investigation to examine the freezing point depression in samples that have been diluted with distilled water. Students will also determine the specific heat capacities of antifreeze/coolant products as compared to pure water and explain how it relates to thermal energy transfer in the internal combustion engine.

Identifying an Unknown, Culminating Project, Classification of Reactions, Experimental Design, Scientific Method, Interdisciplinary, Review, Balancing Equations, Stoichiometry, Concentration, Molarity  High School
Lab: The Culminating Unknown Mark as Favorite (34 Favorites)
In this lab, students identify an unknown from a list of 12 possible compounds by designing a procedure and using evidence to prove their claim. They must draw from knowledge gained throughout the year to properly develop a procedure to identify the unknown.

Stoichiometry, Dimensional Analysis, Mole Concept, Gas Laws, Ideal Gas, Molarity, Concentration, Electrolysis, Electrons  High School
Lesson Plan: Stoichiometry Setup Method Mark as Favorite (65 Favorites)
In this lesson, students will learn how to follow a process of visual cues in combination with a stepbystep problem solving method for different types of stoichiometric problems. This method can be particularly beneficial for students who struggle with completing multistep calculations.

Reaction Rate, Graphing, Temperature, Concentration  High School, Middle School
Lab: StarchIodine Clock Reaction Mark as Favorite (57 Favorites)
In this lab, students perform an iodine clock reaction to determine how concentration and temperature effect the reaction rate.

Solute & Solvent, Molarity, Tyndall Effect, Concentration, Stoichiometry, Dimensional Analysis, Mole Concept  High School
Activity: Solubility & Solutions Mark as Favorite (21 Favorites)
In this inquiry activity, students investigate types of solutions, identifying the solute and solvent, and classifying each solution. They them solve stoichiometry problems involving solutions of different concentrations.

Acid Rain, Acid Base Reactions, Chemical Change, Chemical Change, Indicators, Equivalence Point, pH, Concentration, Molarity  High School
Lab: Seeing the Effects of Acid Rain Mark as Favorite (17 Favorites)
In this lesson, students will prepare an environment and make acid rain to see how the acid rain effects the items in the environment.

Chemical Change, Limiting Reactant, Classification of Reactions, Percent Yield, Stoichiometry, Concentration, Molarity, Mole Concept, Dimensional Analysis  High School
Demonstration: First Day Review Mark as Favorite (20 Favorites)
In this demonstration, students see evidence of a chemical reaction.

Limiting Reactant, Concentration, Net Ionic Equation, Stoichiometry, Balancing Equations, Precipitate, Mole Concept, Dimensional Analysis  High School
Lab: Finding CO_{2} Mass in your Breath Mark as Favorite (36 Favorites)
In this lab, students will measure how much carbon dioxide they exhale by reacting their exhaled breath with limewater (calcium hydroxide solution). Students will practice writing balanced equations and completing masstomass stoichiometric calculations.

Colligative Properties, Boiling Point, Molality, Concentration, Boiling Point Elevation, Graphing, Accuracy, Physical Properties, Error Analysis  High School
Lab: Changing Water's Boiling Point Mark as Favorite (21 Favorites)
In this lab, students will explore colligative properties in a quantitative approach. They will measure the effect of increasing the molality of a salt solution on the solution’s boiling point, and they will graph their data and use the slope of the line of best fit to calculate the boiling point elevation constant of water. There are three versions of the lab, some of which provide more structure and guidance and others of which are more studentdriven.

Titrations, Concentration, Acid Base Reactions, Indicators, Molarity, Interdisciplinary  High School
Lab: Calculating Acid in LemonLime Soda Mark as Favorite (46 Favorites)
In this lab, students will investigate the molarity of citric acid in a clear, lemonlime flavored soft drink through titrations with 0.10M NaOH and an indicator.