Thursday, 7 July 2011

Hydrogen peroxide

Next week we are going to be doing two different practicals which are part of Chemistry.  The first one will use hydrogen peroxide, and the second one will use detergent (among other things).  For today, try and find the following information on these chemicals:
For Hydrogen peroxide:
  1. Its chemical formula.
  2. What properties it has and what it can be used for.
  3. Why it occurs in the body.
  4. How it is broken down and what the products are.
For detergent:
  1. The main chemical that makes it up.
  2. The different characteristics of the two ends of the molecule.
  3. How it cleans oil or food off dishes.
  4. What forces occur between molecules in a bowl of water.
Some websites to give you a hand:
http://www.madsci.org/posts/archives/1999-09/938519528.Bc.r.html - info on hydrogen peroxide.

http://en.wikipedia.org/wiki/Hydrogen_peroxide - structure and formulas.

http://www.google.co.uk/imgres?imgurl=http://www.chemistryland.com/CHM107/Water/Soap02.jpg&imgrefurl=http://www.chemistryland.com/CHM107/Water/WaterQuiz.html&h=358&w=500&sz=36&tbnid=sOTCFK3LGgzENM:&tbnh=93&tbnw=130&prev=/search%3Fq%3Dsoap%2Bmolecules%26tbm%3Disch%26tbo%3Du&zoom=1&q=soap+molecules&hl=en&usg=__o0cJB9QQUBgI4mOIVgz4-1dDy0w=&sa=X&ei=RakWTq33GtC4hAewrcnMBQ&ved=0CCMQ9QEwBA - Information on what detergent does in water.

Finally....
Complete this crossword, trying to keep cheating at a minimum! (Sami).  http://www.creative-chemistry.org.uk/funstuff/xword/rates.htm
Once you're finished, have a look at this website - http://www.canaryzoo.com/Chemistry%20Games.htm