Carbon dioxide dissolved in water is in equilibrium with carbonic acid:
CO2 + H2O ⇌ H2CO3
http://en.wikipedia.org/wiki/Carbonic_acid
No, it's a physical reaction. Water is still water, frozen or vaporous.
It's a physical change because Dry ice is solid carbon dioxide. It goes from a solid to gas by the process called sublimation.
No, temperature change is not chemical!
No
No, simply a physical change. The water in ice is still water, not something else.
no its physical
chemical change
Dissolving salt in water is an example of a physical change. Although the ions of sodium and chlorine separate when the salt dissolves, no chemical reaction takes place.
H2O is the compound water. Forming it from other things would be a chemical change. Using it to react with other substances and form new substances would also be a chemical change. But water just sitting there is not a chemical change. EX: hydrogen(gas) + oxygen(gas) forms water (chemical change) Water + sodium forms sodium hydroxide and hydrogen (gas) (chemical change) BUT water + sugar makes a sugar water solution (not a chemical change) nothing new was made, the sugar just dissolved and the water is still water
no
Yes. The way I think about it is if you can change it back (in this case, you could filter the epsom salt out, or evaporate the water, drying it) then it is a physical change.
Chemical change does not occur in water cycle. There is no change in chemical structure.
Physical
physical
No. It is a physical change. All you have to do to separate the two is to evaporate the water. There is no chemical change.
No.
Dissolving in water is a physical change.
Any reaction occur; sucrose is dissolved in water.
it is physical because there is no new matter will produce(( water+ juice dissolved)) just
false
No chemical reactions occur because sodium only forms ions like chloride.
both physical and chemical change occur
75 dissolved chemical elements