Answer:
The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change.
Chemical reactions can be identified via a wide range of different observable factors including change in color, energy change (temperature change or light produced), gas production, formation of precipitate and change in properties.
list down at least 5 evidences that chemical reaction took place.
Color Change
Formation of a precipitate
formation of a gas,
odor change
temperature change
Color Change
A change in color is also another characteristic of a chemical reaction taking place. For example, if one were to observe the rusting of metal over time, one would realized that the metal has changed color and turned orange. This change in color is evidence of a chemical reaction.
Formation of a precipitate
chemical reactions: precipitation. The precipitate forms because the solid (AgCl) is insoluble in water. For example, sometimes the pipes in our homes get clogged because precipitates of magnesium and calcium oxides have deposited themselves within the pipes.
Formation of a gas,
Many reactions produce a gas such as carbon dioxide, hydrogen sulfide, ammonia, or sulfur dioxide. Cake batter rising is caused by a gas-forming reaction between an acid and baking soda (sodium hydrogen carbonate).
odor change
Odor is generated when substances change composition. A very common example is rotting of eggs, that have a very different odor from fresh eggs. During the process of rotting, chemical reactions take place and egg's composition changes. Another example is that of odor from the sewers.
temperature change
Here are just a few everyday demonstrations that temperature changes the rate of chemical reaction:
Cookies bake faster at higher temperatures.
Bread dough rises more quickly in a warm place than in a cool one.
Low body temperatures slow down metabolism.
Light sticks produce light via a chemical reaction.
hope it helps
sorry kung yung iba 1 example lang
