realease or absorption of energy
product of a gas
formation of a precipitate
change in color
You can identify a chemical reaction in a test tube by observing changes such as color shifts, the formation of a gas (bubbles), or the production of a precipitate (solid) that was not present before. Additionally, changes in temperature or the release of light can also indicate a reaction. If the substances mix and exhibit new properties, it’s a strong sign that a chemical reaction is occurring.
If you see fizzing, bubbling, or a change in color. They're good signs of chemical reactions you can see. Also, smoke. If you see smoke, you probably have a chemical reaction.
You need to calculate the yield of the reaction.
A chemical reaction will do the following; Change colour Create smoke A non chemical reaction (Physical Reaction) will do the following; Change State Be able to change back to the original materials
Chemical equations describe the products and reactants in a chemical reaction.
Yes!! You mixed liquids together and a solid was formed, certainly a chemical reaction. Depending on the reactants you could most likely tell which atoms joined to make the precipitate.
Because it is not a physical change it is a chemical change.
It might be a chemical reaction from water if the metal itself is blue. Otherwise, it might be stained from food or paint.
You can tell when a chemical reaction has occurred by observing changes in color, temperature, formation of a gas, or the formation of a precipitate. Additionally, a chemical reaction often involves the breaking and forming of bonds between atoms, resulting in the rearrangement of molecules.
With magnets.
The apparatus becomes hot.
from a balanced chemical equation