Updating search results...

Search Resources

21 Results

View
Selected filters:
  • concentration
Acid-Base Solutions
Unrestricted Use
CC BY
Rating
0.0 stars

How do strong and weak acids differ? Use lab tools on your computer to find out! Dip the paper or the probe into solution to measure the pH, or put in the electrodes to measure the conductivity. Then see how concentration and strength affect pH. Can a weak acid solution have the same pH as a strong acid solution?

Subject:
Chemistry
Physical Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Chris Malley
Kathy Perkins
Kelly Lancaster
Patricia Loeblein
Robert Parson
Date Added:
09/01/2010
Beer's Law Lab
Unrestricted Use
CC BY
Rating
0.0 stars

The PhET project at the University of Colorado creates "fun, interactive, research-based simulations of physical phenomena." This particular one deals with Beer's Law. "The thicker the glass, the darker the brew, the less the light that passes through." Make colorful concentrated and dilute solutions and explore how much light they absorb and transmit using a virtual spectrophotometer! The simulation is also paired with a teachers' guide and related resources from PhET. The simulation is also available in multiple languages.

Subject:
Chemistry
Physical Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Chris Malley
Emily B. Moore
Julia Chamberlain
Kathy Perkins
Kelly Lancaster
Date Added:
05/14/2012
Chemical Calculations Videos
Only Sharing Permitted
CC BY-NC-ND
Rating
0.0 stars

Learn about chemical calculations through engaging, bitesize animated videos. They are organised into these chapters: chemical calculations, mass calculations, volume calculations and concentration calculations.

Subject:
Physical Science
Material Type:
Lecture
Date Added:
01/12/2016
Concentrate This! Sugar or Salt...
Read the Fine Print
Educational Use
Rating
0.0 stars

Students investigate the property dependence between concentrations and boiling point. In section 1, students first investigate the boiling point of various liquid solutions. In section 2, they analyze data collected by the entire class to generate two boiling point curves, one for salt solutions and one for sugar solutions. Finally, in section 3, students use the data they have analyzed to determine how to create a solution that has a particular boiling point and is a cost-effective design.

Subject:
Applied Science
Chemistry
Engineering
Physical Science
Material Type:
Activity/Lab
Provider:
TeachEngineering
Provider Set:
TeachEngineering
Author:
Courtney Herring
Date Added:
09/18/2014
Concentration
Unrestricted Use
CC BY
Rating
0.0 stars

Watch your solution change color as you mix chemicals with water. Then check molarity with the concentration meter. What are all the ways you can change the concentration of your solution? Switch solutes to compare different chemicals and find out how concentrated you can go before you hit saturation!

Subject:
Physical Science
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Chris Malley
Emily B. Moore
Julia Chamberlain
Kathy Perkins
Kelly Lancaster
Date Added:
03/09/2012
Determining Concentration
Read the Fine Print
Educational Use
Rating
0.0 stars

Students quantify the percent of light reflected from solutions containing varying concentrations of red dye using LEGO© MINDSTORMS© NXT bricks and light sensors. They begin by analyzing a set of standard solutions with known concentrations of food coloring, and plot data to graphically determine the relationship between percent reflected light and dye concentration. Then they identify dye concentrations for two unknown solution samples based on how much light they reflect. Students gain an understanding of light scattering applications and how to determine properties of unknown samples based on a set of standard samples.

Subject:
Applied Science
Engineering
Physical Science
Physics
Material Type:
Activity/Lab
Provider:
TeachEngineering
Provider Set:
TeachEngineering
Author:
Jasmin Hume
Date Added:
09/18/2014
Dyeing to Design
Read the Fine Print
Educational Use
Rating
0.0 stars

Students experiment with various ways to naturally dye materials using sources found in nature—roots, leaves, seeds, spices, etc.—as well as the method of extracting dyes. Then they analyze various materials using statistical methods and tackle an engineering design challenge—to find dyes that best suit the needs of a startup sustainable clothing company.

Subject:
Chemistry
Mathematics
Physical Science
Statistics and Probability
Material Type:
Activity/Lab
Provider:
TeachEngineering
Provider Set:
Activities
Author:
Amanda Grear
Brett Doudican
Carly Monfort
Craig George
Date Added:
10/18/2018
General Chemistry for Health Sciences lab manual 6: Concentration and solution preparation
Conditional Remix & Share Permitted
CC BY-SA
Rating
0.0 stars

This work consists of original text, adapted OpenStax content, and other Open Educational Resources (OER). Each image is attributed with the source page in the figure description, in accordance to each respective license. OpenStax content has been remixed into the “Theory and Background,” “Lab Examples,” and “Relations to Health Sciences” sections of this work. OpenStax remixing consists of rearrangement and minor instructional design augmentations. All other sections within this work are originally created content with adopted OER images, where indicated.

Subject:
Chemistry
Material Type:
Textbook
Author:
Ozlem Yavuz-Petrowski
Date Added:
01/12/2022
General Chemistry for Health Sciences lab manual 8: Spectrophotometry
Conditional Remix & Share Permitted
CC BY-NC-SA
Rating
0.0 stars

This work consists of original content and content adapted from Open Educational Resources (OER). Each image is attributed with the source page in the figure description, in accordance to each respective license. OER content has been remixed into the “Theory and Background” section of this work. Remixing consists of rearrangement, minor instructional design augmentations, and minor phrasing edits. All other sections within this work are originally created content.

Subject:
Chemistry
Material Type:
Textbook
Author:
Ozlem Yavuz-Petrowski
Date Added:
01/12/2022
McNeil Island and WWII Japanese American Draft Resistance
Conditional Remix & Share Permitted
CC BY-NC
Rating
0.0 stars

As a young man, Takashi Hoshizaki was imprisoned on McNeil Island, Washington in 1944 for resisting the draft for World War II.  His resistance was part of a broader legal battle for the civil rights of over 120,000 Japanese Americans, including Takashi's family, imprisoned in American concentration camps.  This lesson includes a 7-minute introduction video, lesson plan notes, activities, vocabulary, and educator resources.

Subject:
U.S. History
Material Type:
Activity/Lab
Lesson Plan
Primary Source
Unit of Study
Author:
Japanese American Memorial Pilgrimages
Washington OSPI OER Project
Date Added:
08/02/2023
Mix It Up
Read the Fine Print
Educational Use
Rating
0.0 stars

This lesson plan introduces the properties of mixtures and solutions. A class demonstration gives the students the opportunity to compare and contrast the physical characteristics of a few simple mixtures and solutions. Students discuss the separation of mixtures and solutions back into their original components as well as different engineering applications of mixtures and solutions.

Subject:
Applied Science
Engineering
Physical Science
Physics
Material Type:
Activity/Lab
Lesson Plan
Provider:
TeachEngineering
Provider Set:
TeachEngineering
Author:
Brian Kay
Daria Kotys-Schwartz
Janet Yowell
Malinda Schaefer Zarske
Date Added:
09/18/2014
Molarity
Unrestricted Use
CC BY
Rating
0.0 stars

What determines the concentration of a solution? Learn about the relationships between moles, liters, and molarity by adjusting the amount of solute and solution volume. Change solutes to compare different chemical compounds in water.

Subject:
Chemistry
Physical Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Chris Malley
Julia Chamberlain
Kathy Perkins
Kelly Lancaster
Robert Parson
Date Added:
02/20/2012
Obi-Wan Adobe: Engineering for Strength
Read the Fine Print
Educational Use
Rating
0.0 stars

Students conduct an experiment to determine how varying the composition of a construction material affects its strength. They make several adobe bricks with differing percentages of sand, soil, fibrous material and water. They test the bricks for strength by dropping them onto a concrete surface from progressively greater heights. Students graph the experiment results and use what they learn to design their own special mix that maximizes the bricks' strength. During the course of the experiment, students learn about variables (independent, dependent, control) and the steps of the engineering design process.

Subject:
Applied Science
Architecture and Design
Engineering
Material Type:
Activity/Lab
Provider:
TeachEngineering
Provider Set:
TeachEngineering
Author:
Jacob Crosby
Malinda Schaefer Zarske
Stephanie Rivale
Date Added:
09/18/2014
Reactions & Rates
Unrestricted Use
CC BY
Rating
0.0 stars

Explore what makes a reaction happen by colliding atoms and molecules. Design experiments with different reactions, concentrations, and temperatures. When are reactions reversible? What affects the rate of a reaction?

Subject:
Chemistry
Physical Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Kathy Perkins
Linda Koch
Mindy Gratny
Ron LeMaster
Trish Loeblein
Date Added:
11/15/2007
Reactions & Rates (AR)
Unrestricted Use
CC BY
Rating
0.0 stars

Explore what makes a reaction happen by colliding atoms and molecules. Design experiments with different reactions, concentrations, and temperatures. When are reactions reversible? What affects the rate of a reaction?

Subject:
Chemistry
Physical Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Kathy Perkins
Linda Koch
Mindy Gratny
Patricia Loblein
Ron LeMaster
Date Added:
12/02/2010
The Search for Surfactants: What Is the Best Soap?
Read the Fine Print
Educational Use
Rating
0.0 stars

Student teams are challenged to evaluate the design of several liquid soaps to answer the question, “Which soap is the best?” Through two simple teacher class demonstrations and the activity investigation, students learn about surface tension and how it is measured, the properties of surfactants (soaps), and how surfactants change the surface properties of liquids. As they evaluate the engineering design of real-world products (different liquid dish washing soap brands), students see the range of design constraints such as cost, reliability, effectiveness and environmental impact. By investigating the critical micelle concentration of various soaps, students determine which requires less volume to be an effective cleaning agent, factors related to both the cost and environmental impact of the surfactant. By investigating the minimum surface tension of the soap, students determine which dissolves dirt and oil most effectively and thus cleans with the least effort. Students evaluate these competing criteria and make their own determination as to which of five liquid soaps make the “best” soap, giving their own evidence and scientific reasoning. They make the connection between gathered data and the real-world experience in using these liquid soaps.

Subject:
Algebra
Mathematics
Measurement and Data
Physical Science
Physics
Material Type:
Activity/Lab
Provider:
TeachEngineering
Author:
Lauchlin Blue
Shawn Richard
Date Added:
02/07/2017
Should I Drink That?
Read the Fine Print
Educational Use
Rating
0.0 stars

Students perform one of the first steps that environmental engineers do to determine water quality sampling and analysis. Student teams measure the electrical conductivity of four water samples (deionized water, purified water, school tap water and a salt-water solution) using teacher-made LED-conductivity testers and commercially available electrical conductivity meters. They use multimeters to also measure the resistance of the samples. They graph their collected data to see the relationship between the conductivity and resistance. Then, all students measure the conductivity of tap water samples brought to school from their homes; they organize and average their data by sub areas within their local school district to see if house location has any relationship to the water conductivity in their community.

Subject:
Applied Science
Career and Technical Education
Electronic Technology
Engineering
Material Type:
Activity/Lab
Provider:
TeachEngineering
Provider Set:
TeachEngineering
Author:
Marjorie Hernandez
Date Added:
09/18/2014
Simple Coulter Counter
Read the Fine Print
Educational Use
Rating
0.0 stars

Students build and use a very basic Coulter electric sensing zone particle counter to count an unknown number of particles in a sample of "paint" to determine if enough particles per ml of "paint" exist to meet a quality standard. In a lab experiment, student teams each build an apparatus and circuit, set up data acquisition equipment, make a salt-soap solution, test liquid flow in the apparatus, take data, and make graphs to count particles.

Subject:
Applied Science
Engineering
Geoscience
Life Science
Mathematics
Physical Science
Physics
Material Type:
Activity/Lab
Provider:
TeachEngineering
Provider Set:
TeachEngineering
Author:
Chuan-Hua Chen
Date Added:
09/18/2014
Sugar and Salt Solutions
Unrestricted Use
CC BY
Rating
0.0 stars

What happens when sugar and salt are added to water? Pour in sugar, shake in salt, and evaporate water to see the effects on concentration and conductivity. Zoom in to see how different sugar and salt compounds dissolve. Zoom in again to explore the role of water.

Subject:
Chemistry
Physical Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Emily Moore
Julia Chamberlain
Kathy Perkins
Kelly Lancaster
Robert Parson
Sam Reid
Trish Loeblein
Date Added:
10/12/2011
pH Scale
Unrestricted Use
CC BY
Rating
0.0 stars

Test the pH of things like coffee, spit, and soap to determine whether each is acidic, basic, or neutral. Visualize the relative number of hydroxide ions and hydronium ions in solution. Switch between logarithmic and linear scales. Investigate whether changing the volume or diluting with water affects the pH. Or you can design your own liquid!

Subject:
Chemistry
Physical Science
Material Type:
Activity/Lab
Interactive
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Archie Paulson
Chris Malley
Jack Barbera
Kathy Perkins
Laurie Langdon
Patricia Loeblein
Wendy Adams
Date Added:
07/01/2008