I need more answers regarding the indication of a chemical change in a substance...an absolute example is "..the formation of bubbles"....or "...release of hydrogen".
What more can you guys give?
2007-07-30 04:15:51 · 7 answers · asked by Jed Stephen 3 in Science & Mathematics ➔ Chemistry
change in appearance, color, consistancy.......... odor.
2007-07-30 04:18:09 · answer #1 · answered by makk 3 · 0⤊ 1⤋
Ok theres a few things you can observe:
Gas evolution-ie the formation of bubbles etc-often called effervesence.
The concentration of reactants changes. This can be seen by a change in the color of colored reactants, which can be studied by colorimetry. Also, the number of ions in solution may change as a reaction progresses, which results in a change in electrical conductivity of the reaction mixture. A conductivity meter is used to measure a reaction of this sort.
A reaction where there is a volume change can be measured using Dilatometry.
2007-07-30 04:22:19 · answer #2 · answered by Simon P 2 · 0⤊ 0⤋
For bubbles:
Eye is the indicator, bubbles are indication.
Release of hydrogen :
Putting / catching in balloon, when it floats is indication, eye is indicator
OR
Ignite released of hydrogen gas, explosion will be indication, eye will be indicator...
2007-07-30 04:31:45 · answer #3 · answered by Anonymous · 0⤊ 0⤋
hey u cud also check the pH, turbidity, consistency, color change, color disappearance, solid formation or precipitate, gas bubble formation, odor, absorption or evolution of heat, optical density, .......thats all i can think of...
2007-07-30 04:36:51 · answer #4 · answered by pahini5 2 · 0⤊ 0⤋
Change of state, change of temperature, change of color, emission of a different odor, Change of transparency etc.
2007-07-30 04:23:15 · answer #5 · answered by Swamy 7 · 0⤊ 0⤋
Endothermic or exothermic reaction (get's cooler/hotter)
2007-07-30 04:20:45 · answer #6 · answered by Del Piero 10 7 · 0⤊ 0⤋
- Explosion or implosion.
- color change
2007-07-30 04:19:10 · answer #7 · answered by lockedjew 5 · 0⤊ 0⤋