Chemical Reactions Explained with Simple Animations

Chemical reactions often show visible signs. The first sign is a color change, like when iron rusts.The second sign is gas production, which we can see as bubbles forming in a solution.The third sign is temperature change. Some reactions release heat, while others absorb it.The fourth sign is precipitate formation, where solid particles form in a liquid solution.In a combination reaction, two or more substances join to form a single product.For example, when iron combines with oxygen from the air, it forms iron oxide, or rust.A decomposition reaction occurs when one substance breaks down into multiple simpler substances.When we pass electricity through water, it decomposes into hydrogen and oxygen gases.In an exchange reaction, parts of two compounds swap to form two new compounds.When silver nitrate solution mixes with sodium chloride, they exchange ions to form silver chloride precipitate and sodium nitrate.