Classroom Resources: Solutions
26 – 50 of 56 Classroom Resources
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Molarity, Concentration, Molality | High School
Activity: Particle Level Molarity
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 Kool-Aid drinks, and then applying that information at the particle level to various models.
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Concentration, Beer's Law, Electromagnetic Spectrum | High School
Lesson Plan: Using Color to Identify an Unknown
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.
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Chemical Change, Beer's Law, Redox Reaction, Reduction, Oxidation, Concentration, Reaction Rate | High School
Lesson Plan: Rustbusters! A Lab Activity on Corrosion
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.
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Beer's Law, Concentration, Physical Properties | High School
Lesson Plan: Introduction to Color
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.
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Le Châtelier's Principle, Reversible Reactions, Concentration | High School
Lab: Le Chatelier’s Soda
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.
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Concentration, Solute & Solvent, Chemical Change | Elementary School, Middle School
Demonstration: Soft Eggs
In this demonstration, students will first observe a reaction between vinegar (acetic acid) and an egg shell (calcium carbonate) to produce a naked egg. Using these eggs, student will analyze how certain substances can move through a membrane and also determine if the membrane is affected.
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Titrations, Indicators, Molarity, Concentration | High School
Demonstration: How to Perform a Titration
In this demonstration, the teacher will show how a titration is set-up 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.
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Beer's Law, Molarity, Concentration | High School
Lab: Beer's Law Discovered
In this laboratory investigation, students will explore the concepts of light absorption, transmittance, and the relationship between absorbance, path length, and concentration of solution.
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Concentration, Mixtures, Interdisciplinary, Scientific Method, Measurements | Middle School, High School
Lab: Effect of Salt Concentration on Plants
In this lab, students will observe how salt concentration can affect the structure of a potato tuber.
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Molarity, Concentration, Mole Concept | High School
Demonstration: What Is a 1 Molar Solution?
In this demonstration, students will determine the molarity of several different solutions demonstrated by the teacher.
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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
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.
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Calorimetry, Exothermic & Endothermic, Temperature, Stoichiometry, Limiting Reactant, Chemical Change, Molarity, Enthalpy, Heat, Concentration, Experimental Design, Scientific Method | High School
Lab: Less Than Zero
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 2-M 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.
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Titrations, Concentration, Indicators, Acid Base Reactions, Equivalence Point, Molarity | High School
Lab: Lethal Dose
In this lab, students will perform several titrations to calculate the concentration of potentially “lethal” medicycloprophic solutions.
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Molarity, Concentration, Saturated/Unsaturated/Supersaturated, Mole Concept, Dimensional Analysis, Stoichiometry, Balancing Equations | High School
Lab: Kool-Aid
In this lab, students calculate grams of Kool-Aid powder required to make 3 different solutions of Kool-Aid (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 Kool-Aid through a taste test.
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Titrations, Acid Base Reactions, Indicators, Chemical Change, Stoichiometry, Balancing Equations, Concentration, Molarity, Error Analysis, Dimensional Analysis, Measurements | High School
Lab: Vinegar Quality Control
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.
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Concentration, Solute & Solvent, Mixtures, Solubility, Percent Composition | Middle School
Lab: The Perfect Kool-Aid Concentration
In this lab, the students will investigate how the concentration of a solution affects its properties such as color and taste.
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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
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.
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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
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.
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Stoichiometry, Dimensional Analysis, Mole Concept, Gas Laws, Ideal Gas, Molarity, Concentration, Electrolysis, Electrons | High School
Lesson Plan: Stoichiometry Set-up Method
In this lesson, students will learn how to follow a process of visual cues in combination with a step-by-step problem solving method for different types of stoichiometric problems. This method can be particularly beneficial for students who struggle with completing multi-step calculations.
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Reaction Rate, Graphing, Temperature, Concentration | High School, Middle School
Lab: Starch-Iodine Clock Reaction
In this lab, students perform an iodine clock reaction to determine how concentration and temperature effect the reaction rate.
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Solute & Solvent, Molarity, Tyndall Effect, Concentration, Stoichiometry, Dimensional Analysis, Mole Concept | High School
Activity: Solubility & Solutions
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.
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Acid Rain, Acid Base Reactions, Chemical Change, Chemical Change, Indicators, Equivalence Point, pH, Concentration, Molarity | High School
Lab: Seeing the Effects of Acid Rain
In this lesson, students will prepare an environment and make acid rain to see how the acid rain effects the items in the environment.
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Chemical Change, Limiting Reactant, Classification of Reactions, Percent Yield, Stoichiometry, Concentration, Molarity, Mole Concept, Dimensional Analysis | High School
Demonstration: First Day Review
In this demonstration, students see evidence of a chemical reaction.
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Limiting Reactant, Concentration, Net Ionic Equation, Stoichiometry, Balancing Equations, Precipitate, Mole Concept, Dimensional Analysis | High School
Lab: Finding CO2 Mass in your Breath
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 mass-to-mass stoichiometric calculations.
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Colligative Properties, Boiling Point, Molality, Concentration, Boiling Point Elevation, Graphing, Accuracy, Physical Properties, Error Analysis | High School
Lab: Changing Water's Boiling Point
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 student-driven.