list the two examples each of useful and harmful chemical changes
Answers
Answer:
Bleach and Acid. Household bleach is a ubiquitous and useful cleaning agent, but it's quite reactive and produces toxic fumes if combined with acids such as vinegar. ...
Bleach and Ammonia. Ammonia is a form of base, the chemical opposite of an acid. ...
Oven Cleaner and Acid. ...
Answer:
Not all reactions are chemical. However, if a reaction makes a new substance, then you are looking at a chemical change. For example, those fireworks covering the sky on the fourth of July are the result of a chemical change. Photosynthesis in plants is also an example of a chemical reaction. In this case, sunlight is changed into food for the plant. Typically, chemical reactions have a few tells, including:
Color changes
Releasing or absorbing of energy
Odor changes
Gas production
Chemical changes happen all around you, even in your own home. Explore some fun examples in cooking, nature, and your home.