density

Exploring Color Separation in Salting-Out Experiments preview image with image showing color changes from green to blue over yellow
Exploring Color Separation in Salting-Out Experiments
// Saturday, May 4, 2024 • Tom Kuntzleman
In “salting out” demonstrations, a mixture of water and an organic liquid separates into two layers upon addition of an inorganic salt.1-4 Typically, acetone or various alcohols are used for the organic liquid, while NaCl, Na2CO3, or K2CO3 are used as the salt.
The Floating Soap Bubble
// Monday, August 21, 2023 • Tom Kuntzleman
The floating soap bubble1 is an experiment that is very easy to set up and carry out (Video 1).
international load line markings
Seawater Chemistry and Global Trade- Part 2
// Monday, June 6, 2022 • Scott Donnelly
The first blog post of this seawater-oceanic shipping series deals with an introductory classroom activity that challenges students to predict how the composition and temperature of seawater influences a ship's buoyancy.
Multicolored experiment
Solution to Chemical Mystery #19: Multi-colored Mixture
// Sunday, February 6, 2022 • Tom Kuntzleman
In Chemical Mystery #19,1 a yellow liquid is poured into a test tube, and the liquid turns red. When a white sold is added to the red liquid in the test tube, the liquid turns blue.
collage of 4 images constructing a sugar density column
Demonstration: Colorful Sugar Density Column
// Tuesday, March 23, 2021 • Nick Thomas
Demonstrating the densities of various liquids (oils, alcohol, detergent, syrup, etc.) in a tall glass container is a popular at-home science activity described on many websites.1-3 Colored sugar solutions of varying concentrations can similarly be layered to illustrate density and generally require the lower density solutions to be care
the author in tie dye lab coat performing spiral staircase demo
The Carbon Dioxide Spiral Staircase
// Monday, March 15, 2021 • Douglas Mulford
There have been many demonstrations and experiments published online and in the Journal of Chemical Education throughout the years dealing with various aspects of gas chemistry, and CO2 sublimation in particular.1 The demonstration where CO2 generated from dry ice or a chemical reaction is used to snuff out a ca
text: Colorful Candy Chemistry
How Does the Rainbow Candy Experiment Work?
// Monday, February 8, 2021 • Tom Kuntzleman
Have you seen the rainbow candy experiment? It's a very simple experiment that involves pouring water into a plate that has M&M's candies or Skittles arranged in a pattern. Very curious shapes of sharply divided regions form spontaneously. How does this happen?! 
text DENSITY - A Virtual Chemistry Lab
Introducing Density - A Free Virtual Chemistry Lab Activity
// Wednesday, September 16, 2020 • Josh Kenney
As much of the world remains affected by COVID-19, some schools remain in virtual or hybrid learning structures for the fall semester. These modified learning environments have significantly restricted classroom laboratory work.