Solubility and Concentration - A Free Virtual Chemistry Lab Activity
As cases due to COVID-19 continue to rise , many schools remain locked in virtual learning formats. Consequently, meaningful laboratory work remains a challenge for many. This semester, I started creating my own virtual chemistry laboratory activities for my high school chemistry course.
In this activity, students learn about solubility and concentration. In section 1, students answer questions from a video that explains the dissolving process and how to calculate the molarity of a solution. In section 2, students answer questions from a video that explains supersaturation and how to make rock candy from a supersaturated solution of sugar and water. Then, they use a PhET simulation to explore factors that affect the concentration of a solution. Finally, in section 3, instructions are included so that students can try making their own rock candy at home.
This activity can be completed in one 50 minute class period. The extension "at home" section would require about 60 more minutes.
Section 1 and 2 only require YouTube videos and the PhET simulation, " Concentration ", Section 3 (at-home investigation) requires 2 cups of tap water, 6 cups of granulated sugar, wooden skewers, clothes pins, large glass mason jar, pot for boiling water.
Section 1 - Dissolving and Concentration
The activity begins with a short video (video 1) that introduces the dissolving process. This video explains how certain substances dissolve in water, defining terms like solute, solvent, and solution. Additionally, students learn and practice calculating the molar concentration of a solution.
How does dissolving work? (& molarity)
Video 1: How does dissolving work? (link is external) on the Science Classroom (link is external) YouTube Channel (Published 10/20/2020)
Section 2 - Factors that Affect Concentration
Once again, students watch a short video (video 2) that introduces factors that affect concentration. Specifically, this video describes the relationship between the temperature of a solution and the solubility of a solid. The video also demonstrates how this knowledge can make rock candy from a supersaturated sugar and water solution. After the video, students use the PhET simulation, Concentration (PhET Interactive Simulations at University of Colorado Boulder, under the CC-BY 4.0 license, to explore other factors that affect concentration.
Supersaturated Sugar Solution!
Video 2: Supersaturated Sugar Solution (link is external) on The Science Classroom (link is external) YouTube Channel (Published 10/23/2020).
Section 3 - Try it at Home
The final, optional section of the lab provides instructions for students to make their own rock candy (image 1). The procedure is simple enough that they can perform it in their kitchen at home.
Image 1: Rock candy produced according to the instruction in section 3.
Students work through the Virtual Lab Activity: Solubility and Concentration assignment document (found in the Supporting Information) as described below (image 2). log into your ChemEd X account for access. The document includes all of the required links to videos and PhET simulations.
Image 2: Example of questions in the student document (available in the Supporting Information).
The student document, including questions, can be found in the Supporting Information below. Log into your ChemEd X account for access.
No teacher preparation is required unless completing the "at home" portion as a demonstration for students.
YouTube Channel: The Science Classroom . & PhET Simulations
General Safety
For Laboratory Work: Please refer to the ACS Guidelines for Chemical Laboratory Safety in Secondary Schools (2016) .
For Demonstrations: Please refer to the ACS Division of Chemical Education Safety Guidelines for Chemical Demonstrations .
Other Safety resources
RAMP : Recognize hazards; Assess the risks of hazards; Minimize the risks of hazards; Prepare for emergencies
IMAGES
VIDEO
COMMENTS
Study with Quizlet and memorize flashcards containing terms like To test the hypothesis above, you changed the _____of the solvent and measured the _____of a solid., Therefore, the independent variable was_____and the dependent variable was_____., The results of this lab experiment_____the hypothesis. and more.
Lab: Solubility Student Guide Pre-Lab Information. ... Assignment 3R - EL5733 - it is here for chem; Copy of Boyles Charles SE; S00726 002 0343 3 - Leucine; Lab; 2020 21 mj earth science curriculum map revised; Related documents. 2422-Article Text-3162-2-10-2018 0912; Calorimetry and Specific Heat Lab;
Add the sugar after heating the mixture. Fact 1: Dissolved oxygen is one of the most important nutrients needed by fish in the aquatic environment to survive. Fact 2: Unlike solids, whose solubility increases with increasing temperature, the solubility of gases generally decreases with increasing temperature.
Check all that apply. adding ice. adding heat. altering amount of water. using a different kind of cocoa mix. By the end of this lab, you will determine whether you should add cocoa mix (a solid) before or after heating water (liquid) to make hot chocolate. State a broad question about solubility whose answer would help you determine this.
Students work through the Virtual Lab Activity: Solubility and Concentration assignment document (found in the Supporting Information) as described below (image 2). log into your ChemEd X account for access. The document includes all of the required links to videos and PhET simulations. Image 2: Example of questions in the student document ...
Solubility Pre-Lab Assignment Before coming to lab: • Read the lab thoroughly. • Answer the pre-lab questions that appear at the end of this lab exercise. ... Print the graph and include it with your post-lab assignment. 19-5 Part III: Determination of Saturated Solutions 1. Obtain seven clean, dry small test tubes. 2. Add approximately 0.8 ...
Lab Report Title: Solubitity Purpose: To explore the relationship between temperature and solubility using a laboratory procedure. Introduction: This experiment is being conducted so we can see a substance holds more or less solute depending on a change in temperature.
Lab 8 Assignment. Solubility (Fill in the blank/Short answer) (See CHM 1010 for Solubility Course Material) Henry's law states that the solubility of a gas in a liquid is proportional to the _____. Partial pressure in the gas. Describe two ways to increase the solubility of gaseous CO 2 in water?
Solutions and Solubility - Assignment. What is the solubility of substance? a. how fast the solute dissolves in the solvent. b. the amount of solute needed in a saturated solution. c. the mass of a solute that dissolves in 100 g of solvent. d. the amount of solvent in a substance. Click the card to flip 👆.
Solubility Pre-Lab Assignment Before coming to lab: • Read the lab thoroughly. • Answer the pre-lab questions that appear at the end of this lab exercise. Purpose A series of standardized dilutions of copper(II) sulfate pentahydrate (CuSO 4 ·5 H 2 O) will be used
blank sheet lab: solubility student guide information purpose explore the relationship between temperature and solubility using laboratory procedure. time. Skip to document. ... Assignment 2R - EL5733 - it will help you. Environmental Science 100% (22) 5. Gizmo Student Exploration: Water Pollution Answers.
The solubility of glucose at 30°C is. 125 g/100 g water. Classify a solution made by adding 550 g of glucose to 400 mL of water at 30°C. Explain your classification, and describe how you could increase the amount of glucose in the solution without adding more glucose. The solution is saturated.At 30°C, 500 g of glucose will dissolve in 400 ...
Answer. Solubility is influenced by temperature and pressure, with Henry's law relating the pressure of a gas to its solubility in a liquid. The solubility of different salts in water should be observed and recorded during the lab. Solubility is a property referring to the ability of a substance (solute) to dissolve in a solvent, such as water.
Solubility Lab Report. Nicholas Munoz P Edgenuity. Purpose To explore the relationship between temperature and solubility using a laboratory procedure. Hypothesis If the temperature of the liquid is increased, then more sugar will dissolve, because warm solutions hold more solute than cold solutions.
- The results of this lab experiment *_____ the hypothesis. *temperature *solubility * temperature * solubility * clearly supported - Which solubility curve on the right best represents the data table on the left?