A safe and easy universal acid/base indicator.
As the pH of a solution increases, red cabbage juice changes gradually from red to green. By matching the color of the solution to the included chart, the pH of a solution can be determined. Safer than phenolphthalein. This 20 gram bottle of powdered extract is enough to prepare five gallons of indicator solution!
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No muss, no fuss
Apr 22, 2014 | By Robin Vernuccio of New York, NY United States
Red Cabbage extract
Apr 11, 2014 | By Rick Krustchinsky of Houston, TX United States
Oct 10, 2013 | By Jean Baker of Bladensburg, MD United States
Not quite as expected
Apr 20, 2013 | By Jen H of Shingletown, CA United States
Red Cabbage for Bromothymol Blue
Aug 24, 2012 | By Charles Harrison, Ph D of St Louis, MO United States
May 29, 2012 | By Donna Bianco of Staten Island , NY United States
This product will support your students' understanding of the Next Generation Science Standards (NGSS)*, as shown in the table below.
Suggested Science Idea(s)
Students can use Red Cabbage Extract in an investigation to describe and classify different kinds of materials by their observable properties.
Students can gather data to analyze from an investigation where they use Red Cabbage Extract to test different materials to determine which have the properties that are best suited for an intended purpose.
Students can use Red Cabbage Extract to make observations and measurements to identify materials based on their properties.
Students can use Red Cabbage Extract in an investigation to analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred
DCI-MS/ETS1.B: Developing Possible Solutions.
A solution needs to be tested, and then modified based on test results in order to improve it.
Students can use Red Cabbage Extract to construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the Periodic Table and knowledge of the patterns of chemical properties.
Students can use Red Cabbage Extract as a pH indicator. Younger students can simply observe the color changes to understand the concept of Acids and bases. Older students can test known substances to create their own pH indicator card with approximate numerical value and color chart.
* NGSS is a registered trademark of Achieve. Neither Achieve nor the lead states and partners that developed the Next Generation Science Standards were involved in the production of, and do not endorse, this product.