Classroom Resources: Solutions
1 – 9 of 9 Classroom Resources
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Concentration, Titrations, Indicators, Equivalence Point, Chemical Change, Accuracy, Error Analysis, Chemical Change | Middle School, High School
Lesson Plan: Comparison of Vitamin C in Juice Drinks
In this lesson, students will use a color-changing indicator called indophenol and a simplified titration method to determine if vitamin C is present in a variety of store-bought juices. The indicator solution will turn from dark blue to colorless once all the indophenol has reacted with vitamin C in the juices. Students will count how many drops of juice it takes to produce this color change in a 5-mL sample of indicator solution. The greater number of drops it takes to cause the color change, the less vitamin C is present in each drop. They will use their data to compare the relative amounts of vitamin C in the juices to a solution prepared from a vitamin C tablet.
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Colligative Properties, Boiling Point Elevation, Freezing Point Depression, Concentration, Solute & Solvent, Boiling Point, Freezing Point, Phase Changes, Molecular Motion, Graphing, Physical Properties, Heat, Temperature | Middle School, High School
Activity: Simulation Activity: The Effect of Solutes on Boiling and Freezing Point
In this activity, students will use a colligative properties simulation to investigate the effects of different solutes, and different amounts of those solutes, on the boiling point and freezing point of a solution. Students will see particle-level animations of boiling and freezing with different types and amounts of solutes, as well as graphical representations of the results of each trial.
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Concentration, Percent Composition | Middle School, High School
Lab: Homemade Hydrometers
In this lesson, students will engineer simple hydrometers from straws and clay to learn about standard solutions, calibration, and instrument drift. They will use their hydrometers to test the salinity of samples of natural water.
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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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Concentration, Solute & Solvent | Middle School, High School
Lesson Plan: Diffusion and Osmosis
In this lesson, students will build upon their understanding of solutions and concentration. They will observe the diffusion of food coloring dye in water and then perform an experiment focused on how solutions of different concentrations will affect the movement of water across a semi-permeable membrane.
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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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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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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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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.