Answer:
below :)
Explanation:
Question: how can you observe a chemical change?
well first let’s review what even are a chemical changes characteristic, which are: color change, formation of a precipitate, formation of a gas, odor change, temperature change
Also as we know, unlike a physical change, a chemical congé can’t reverse back
Ex- physical change would be water, since it can always change back and through it’s different forms
Ex - chemical change would be baked dough, since the temperature increased, causing the dough to change chemically and be cooked. Hence, it can’t be changed back.
With this information, you could write:
There are five main ways to observe a chemical change. These include a change in color, odor change, formation of a gas, temperature change, and formation of precipitate. First, an example of a chemical color change is metal rusting over time. The color of metal, which is a silver, changes to a orange/brown color and cannot be changed back. Secondly, a formation of precipate change would be soap, “which is actually a precipitate that forms when minerals in hard water react with soap molecules.” (<em>Five Characteristics of a Chemical Change</em>) Thirdly is a formation of gas, which would be like burning would, since it relases smoke, aka a gas. Fourthly, and odor change, which would be an egg rotting. Over time, as the egg last, it starts to rot as it’s chemical coumpinds breakdown and cannot be reversed. Lastly, a temperature change. An example of this is when you mix two chemicals together and they release heat. These are all examples of chemical changes and how to spot them.
Article that helped me with examples: https://sciencing.com/5-ways-chemical-change-occurred-10025863.html
Have a nice day!
