what happens when you heat food color powder in a test tube? is that a cemical change? salt pops in a test tube upon heating. is that a chemical change? pls help me A.S.A.P...
2007-04-28 21:03:12 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
The salt pops up when the crystals expand slightly, and break. They will melt when you get to 801C - but they are still NaCl.
Both of these are physical changes, because no new chemical is formed.
2007-04-28 21:33:52 · answer #1 · answered by Gervald F 7 · 0⤊ 1⤋
changing shade is commonly categorised as a chemical replace to me, the presence of fragrant compounds outcomes interior the presence of shade - yet i'm not sure. A precipitating salt could be a chemical replace.
2016-12-28 03:29:28 · answer #2 · answered by kittie 3 · 0⤊ 0⤋
nacl is a substance that has no colour. when heated it reacts to form a salty substance that you put on food . it can also be found in the sea. when mixed with air it forms nacl + o2
hopefully this helps.
2007-04-28 23:23:11 · answer #3 · answered by always_coca_cola_uk 1 · 0⤊ 0⤋