HELP ON QUESTINS
IDENTIFY SOME OF THE SIGNS THAT A CHEMICAL CHANGE HAS OCCURED
2007-04-25 00:42:23 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
color change
odor change
effervescence (gas formation/bubbling)
formation of precipitate (some solid stuff on the bottom of the container)
contrary to popular belief, change in state does not necessarily mean a chemical change; it's merely a physical change. try boiling water... water (liquid) changes to water vapor (gas) but the chemical composition is still the same: H2O.
2007-04-25 00:58:30 · answer #1 · answered by Zen 2 · 0⤊ 0⤋
Chemical change takes place when the chemical properties of the substances taking place are totally different frm the chemical properties of the substance(product) formed.
With that change of colour, change of state, odour also changes
2007-04-25 07:53:09 · answer #2 · answered by Ash 2 · 0⤊ 0⤋
Color change, odor, change from one state to another could all be indicators that a chemical change has occured. =)
2007-04-25 07:47:04 · answer #3 · answered by city_gurl 1 · 0⤊ 0⤋
visit this site for your reference and examples.
http://www.ric.edu/ptiskus/chemical/
2007-04-25 07:55:56 · answer #4 · answered by Kristin 2 · 0⤊ 0⤋
some of its elements change
change of smell
2007-04-25 09:00:35 · answer #5 · answered by Jeniv the Brit 7 · 0⤊ 0⤋