Chemicals/science
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Question
How do you know that a chemical or physical change happened?
Physical would be something you can see. For example, an ice cube melts. A chemical change is something you can see as well but the substance is no longer the same. For instance the rusting of a nail, you can see the rust(physical) however a chemical change has occured as well. The iron reacted with O2 to form iron oxide or iron hydroxide. (the rust)
Evidence of a change in a reaction would be: heat, smell, solid formation (precipate), cold.
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Leo Carr
Expertise
I can answer most questions on general chemistry, both lecture and lab. I cannot answer most questions regarding sub-topics such as organic and biochemistry questions.
Experience
Chemist for just under 20yrs. Currently work as a laboratory manager in the departments of chemistry, biology, and physics. Teach chemistry as an adjunct at my primary college and at a local university.
Organizations
American chemical Society, National Registry of Certified Chemists, National Association of Scientific Material Managers, Chemical Heritage Society
Education/Credentials
B.S., M.S.
Awards and Honors
Certified Chemical Hygiene Officer
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