State whether each of the following is a physical or chemical property........
a) Electricity decomposes water.
b) Ice floats on water
c) Potassium metal fizzes in water
d) Acetone dissolves in water
thanks,
2007-02-01 17:58:45 · 7 answers · asked by Sara 1 in Science & Mathematics ➔ Chemistry
a) chemical
b) physical
c) physical
d) chemical
2007-02-01 18:07:21 · answer #1 · answered by Jock BOD w/ a geek's wits 2 · 0⤊ 0⤋
The first three are pretty obvious:
a- Chemical (electrolysis)
b- Physical (buoyancy) ( see http://www.stuffintheair.com/buoyancy-experiment.html )
c- Chemical (reaction)
There seems to be some uncertainty over d. The question is, does the molecular structure of either the acetone or water change? No, not at all, they just mingle.
So that's physical.
2007-02-05 16:51:03 · answer #2 · answered by Radiosonde 5 · 0⤊ 0⤋
A. is the breakdown of water into hydrogen and oxygen so it is a chemical reaction
B. is a physical property
C. is a chemical change which produces KOH and hydrogen gas
D. is a physical change since it is a solubility affect and you can use physical means to seperate the two compounds
2007-02-02 03:27:37 · answer #3 · answered by Travis T 1 · 0⤊ 0⤋
a) chemical, as it involves dissociation of water into ions, which is based on exchange of electrons & its mechanisms (which you find in Chemistry!).
b) physical, as it is due to a physical property called density.
c) chemical, as it involves a chemical reaction.
d) chemical, as it too involves a chemical reaction.
2007-02-01 19:52:09 · answer #4 · answered by Kristada 2 · 0⤊ 0⤋
a)chemical
b)physical
c)chemical
d)chemical
2007-02-01 18:03:19 · answer #5 · answered by B.Dunc 2 · 0⤊ 0⤋
physical
physical
chemical
chemical
2007-02-01 18:04:08 · answer #6 · answered by Anonymous · 0⤊ 0⤋
a) physical
b) physical
c) chemical
d) physical
You are welcome... good luck!!!
2007-02-01 18:11:57 · answer #7 · answered by killercuy 2 · 0⤊ 0⤋