MadSci Network: Chemistry

Subject: Water and teaching misconceptions

Date: Thu May 13 12:21:33 1999
Posted by Robert Cheeseman
Grade level: teacher/prof School: Hardin Middle School
City: Hardin State/Province: MT Country: USA
Area of science: Chemistry
ID: 926616093.Ch

Most diagrams of water dissolving salt show the molecules of salt seperating 
into ions
Na+ and Cl- being pulled about by water- My question is this- Isn't it 
incorrect to show this happening as what the result 
is then is a chemical reaction decomposing
NaCl making a solid reactive in water and Cl gas which is poisonous?
If salt is still salty in water, then wouldn't the diagramming be more correct 
to show the NaCl molecules being seperated 
from other NaCl molecules but still staying as NaCl?

Re: Water and teaching misconceptions

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