Science Fair Projects Ideas - Chromate

All Science Fair Projects

 		      

Science Fair Project Encyclopedia for Schools!
  Search    Browse    Forum  Coach    Links    Editor    Help    Tell-a-Friend    Encyclopedia    Dictionary     

Science Fair Project Encyclopedia

For information on any area of science that interests you,
enter a keyword (eg. scientific method, molecule, cloud, carbohydrate etc.).
Or else, you can start by choosing any of the categories below.

Science Fair Project Encyclopedia Contents Page

Chromate

Chromates and Dichromates are salts of chromic acid and dichromic acid, respectively.

The chromium atoms are in oxidation state VI in both, and the chromate and dichromate ions are fairly strong oxidizing agents.

In an aqueous solution, yellow chromate (CrO42-) and orange dichromate (Cr2O72-) ions are in a chemical equilibrium. This equilibrium is pushed towards dichromate by lowering the pH (making the solution more acidic) - a classic demonstration of Le Chatelier's principle.

2 CrO42- + 2 H3O+ → Cr2O72- + 3 H2O

They are used in environmental analysis to measure chemical oxygen demand (COD).

They are carcinogenic.

Last updated: 10-19-2005 16:32:26
Science Fair Project Encyclopedia Contents Page
10-26-2009 08:16:03
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details
Science kits, science lessons, science toys, maths toys, hobby kits, science games and books - these are some of many products that can help give your kid an edge in their science fair projects, and develop a tremendous interest in the study of science. When shopping for a science kit or other supplies, make sure that you carefully review the features and quality of the products. Compare prices by going to several online stores. Read product reviews online or refer to magazines.

Start by looking for your science kit review or science toy review. Compare prices but remember, Price $ is not everything. Quality does matter.
Science Fair Coach
What do science fair judges look out for?
ScienceHound
Science Fair Projects for students of all ages
All Science Fair Projects.com Site
All Science Fair Projects Homepage
Search | Browse | Links | From-our-Editor | Books | Help | Contact | Privacy | Disclaimer | Copyright Notice