# Classroom Resources: Solutions

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1 – 25 of 27 Classroom Resources

• Solubility, Entropy, Le Châtelier's Principle, Gibb's Free Energy , Equilibrium Constants, Enthalpy | High School

### Lesson Plan: Relationship Between Free Energy and the Equilibrium Constant

In this lesson, students will explore the relationships between solubility and Keq (specifically Ksp), as well as Keq and DG°. First, a guided inquiry activity will introduce the relationship between standard free energy and equilibrium constant with the equation DG° = -RTlnKeq. Then data collection regarding solubility of potassium nitrate at various temperatures will lead to the calculation of Ksp and DGo for the dissolution reaction at those temperatures. Students will manipulate the equations DG° = -RTlnKeq and DG° = DH° - TDS° to derive a linear relationship between 1/T and lnKeq, which will then be graphed to determine values for DH° and DS°.

• Solubility, Intermolecular Forces, Molarity | High School

### Activity: Solutions Escape Room

In this activity, students will review concepts covered in a solutions unit. They will complete problems in order to determine codes that will allow them to advance through stages of a Google Form, which is set up as an escape room. This activity is designed to be used at the end of a unit, or as an alternate to an exam, particularly in a virtual environment.

• Separating Mixtures, Mixtures, Solubility, Intermolecular Forces | High School

### Lab: Using Paper Chromatography to Separate the Pigments Found in Ink

In this lab, students will separate the component pigments of a water-soluble black marker using paper chromatography.

• Physical Properties, Solubility, Polarity, Covalent Bonding, Intermolecular Forces, Molecular Geometry, Electronegativity | Middle School, High School

### Activity: The Chemistry of Water Video Questions

In this lesson, students will watch a video and answer questions about how the molecular geometry and polarity of water give rise to many of its unusual physical properties, including its relatively high boiling point and its ability to dissolve some substances but not others.

• Physical Properties, Solubility, Melting Point, Naming Compounds, Molecular Formula, Ionic Bonding, Ionic Radius, Ions | High School

### Activity: My Name is Bond, Ionic Bond

In this lesson, students will demonstrate their knowledge of ionic bond strength using a “brackets” activity. Pairs of students start the activity playing a game of “Ionic Compound War” to build eight compounds. Then then transfer the compounds to a “bracket” and use their knowledge of ionic bonding, along with a solubility chart, to predict the strongest and weakest bond between four pairs of ionic substances.

• Physical Properties, Solubility, Melting Point, Naming Compounds, Molecular Formula, Ionic Bonding, Ionic Radius, Ions | High School

### Activity: Ionic Bonding Brackets

In this lesson, students will demonstrate their knowledge of ionic bond strength and its relationship to the properties of melting point and solubility using a “brackets” activity. After analyzing the ionic charge and radius to predict the strongest and weakest bond between four pairs of ionic substances, they will then determine which will be the least soluble.

• Solubility, Concentration, Solute & Solvent | High School

### Demonstration: Saturated Solutions: An Engagement Activity

In this demonstration, students will observe salt dissolving in water and participate in a think-pair-share activity using teacher-led questions. It is intended to be an introduction to solutions, particularly saturation.

• Solubility, Reaction Rate, Balancing Equations, Stoichiometry | High School

### Lab: Analyzing the Reaction between Baking Soda and Citric Acid

In this lab, students will examine the reaction between citric acid and baking soda. They will analyze the chemical equation, balance it and calculate needed quantities of each reactant for a complete reaction. Based on their observations, students will determine if all reactants were completely used during the reaction.

• Solubility, Solute & Solvent, Intermolecular Forces, Molarity, Net Ionic Equation, Solubility Rules, Beer's Law | High School

### Lesson Plan: Aqueous Solutions 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 Aqueous Solutions to your students.

• Solubility, Intermolecular Forces, Polarity, Covalent Bonding, Solute & Solvent, Intermolecular Forces | High School

### Activity: T-Shirt Chromatography

In this activity, students will learn about solubility, saturation, polarity, and intermolecular forces through chromatography techniques.

• Solubility, Temperature, Pressure, Concentration, Solute & Solvent | High School

### Demonstration: Exploring Gas Solubility

In this demonstration, students will explore how changes in pressure and temperature affect the solubility of a gas in an aqueous solution. In addition, students will have the opportunity in a post-demonstration reflection activity to practice using data (in this case their demonstration observations) to make evidence based claims.

• Solubility, Solute & Solvent, Intermolecular Forces | Middle School, High School

### Activity: Advanced Modeling of the Dissolving Phenomenon

In this activity students build a model of sodium chloride based on their own knowledge of ionic compounds. Then they construct a model of the interactions between water and their salt model to develop an understanding of what caused the salt to dissolve. After refining their models based upon class discussions and critiques, students then construct a model of the interaction between salt and a different solvent, alcohol. Using their models, students make predictions as to which solvent (water or alcohol) would be better at dissolving the salt. Finally students design an experiment to test their prediction. As an extension, students are asked to use their solubility models to explain why calcium carbonate will not dissolve in water, even though it is also an ionic compound.

• Solubility, Solute & Solvent, Intermolecular Forces | Middle School, High School

### Activity: Basic Modeling of the Dissolving Phenomenon

In this activity, students explore the process of salt dissolving in water using cut-outs of ions and water molecules to model interactions between them. They then use their model to make a prediction about the relative solubility of salt in isopropyl alcohol compared to the solubility in water and design an experiment to test their prediction.

• Solubility, Solute & Solvent | Middle School, High School

### Lab: What's the Solution?

In this lab students will choose one factor that can affect the rate at which a solute will dissolve into solution –amount of stirring, temperature, or particle size, and will design a procedure that can be used to determine how it will affect rate of solution. Students will identify one of the factors above as the independent variable and will determine how it affects the solubility rate as supported by time required to dissolve the solute.

• Solubility, Molecular Structure, Buffers | High School

### Lab: Aspirin Tablets: Are they all the Same?

In this lab, students will design an experiment to test the time and completeness of dissolution of various types of aspirin in different pH environments.

• Solubility, Solute & Solvent | High School

### Demonstration: Root Beer Chemistry

In this demonstration, students will understand the factors affecting solubility of both a solid and a gas in a liquid through the process of making root beer.

• Mixtures, Solubility, Intermolecular Forces, Polarity, Solute & Solvent, Intermolecular Forces, Molecular Geometry | Elementary School, Middle School, High School

### Animation: Solubility Animation

In an animation, students will have an opportunity to visualize on the particulate level how solubility works. Examples of ionic compounds and a polar covalent compound show how when water is attracted to charged parts, they dissolve, and when they're not attracted to charged parts they stay solid. **This video has no audio**

• Observations, Separating Mixtures, Solubility, Concentration, Precipitate, Identifying an Unknown, Molarity, Net Ionic Equation, Balancing Equations, Percent Yield, Stoichiometry, Limiting Reactant, Mole Concept, Dimensional Analysis, Graphing | 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.

• Solubility, Chemical Change, Precipitate, Net Ionic Equation, Balancing Equations, Chemical Change, Solubility Rules | High School

### Lab: Ions in Aqueous Solution Presentation

In this lab, students will mix ionic solutions to determine what combinations form precipitates.

• Solubility, Covalent Bonding, Precipitate, Ionic Bonding, Molecular Structure, Solute & Solvent, Saturated/Unsaturated/Supersaturated | High School, Middle School

### Lab: Benzoic Acid Blizzard in a Bottle

In this lab, students create a snow globe by taking advantage of benzoic acid’s solubility properties in hot water.

• Solubility, Precipitate, Solute & Solvent, Saturated/Unsaturated/Supersaturated | High School, Elementary School, Middle School

### Lab: Winter Crystals

In this lab, students will create a supersaturated solution by dissolving borax in boiling water. They will create a snowflake using pipe cleaner to suspend in the solution, which will serve as a nucleation site for crystallization as the solution cools and remains undistributed overnight. This lab gives students an opportunity to experience the exciting crystallization process and become more familiar with an engaging chemistry spectacle!

• Solubility, Concentration, Acid Base Reactions, Intermolecular Forces, Titrations, Indicators, pH | High School

### Lab: Alka-Seltzer & Gas Solubility

In this lab, students will use a reaction to investigate temperature and the solubility of carbon dioxide and will use a neutralization reaction and an indicator to verify the amount of carbon dioxide produced at each temperature.

• Observations, Physical Properties, Mixtures, Solubility, Intermolecular Forces, Polarity, Identifying an Unknown, Intermolecular Forces, Chemical Properties, Intramolecular Forces, Mixtures | High School

### Lab: Solubility & Compound Type

In this lesson, students determine whether unknown substances are polar, nonpolar, or ionic by testing their solubilities.

• Density, Physical Properties, Mixtures, Solubility, Freezing Point, Polarity, Phase Changes, Intermolecular Forces, Colligative Properties, Intermolecular Forces, Freezing Point Depression, Mixtures | High School

### Lesson Plan: Fuel Line Antifreeze

In this lesson students will explore the role of a gasoline additive, fuel line antifreeze (generally methanol or 2‑propanol), in reducing the potential of water to block fuel lines in freezing weather. Students will prepare test tube models of water-contaminated fuel tanks and explore the effect of adding different types of fuel line antifreeze. This lesson can be used to bolster concepts about miscibility, density, intermolecular forces, phase changes (freezing), and colligative properties (freezing point depression).

• Mixtures, Solubility, Reaction Rate, Saturated/Unsaturated/Supersaturated | High School

### Lab: Rate of Solution

In this lab, students observe how particle size, solvent temperature, and agitation affect rate of solution.