Rust.
When iron is oxidized it changes the stucture of the molecules and weakens it
Bleach.
Spill some on your jeans and see what happens to the cloth
.
Food digestion.
The acidic gastric juices react with the food we eat to break them down chemically into a form our bodies can use.
Epoxy
Mix the two chemicals together in epoxy and you will have a subtance as strong as some steel.How do the chemical changes affect our every day life?Food digestion, for a very important one.
