1. Acids and Bases

2. Chemical Compound Compounds are groups of two or more elements that are bondet together.A molecule is the general term used to describe atoms connected by chemical bonds. Every combination of atoms is a molecule. Compounds happen with atoms from different elements. So, all compounds are molecules, because they have bonds between the atoms, like in water (H 2 O). Wikipedia

3. Chemical formulae The simplest types of chemical formulas are called empirical formulas. Sometimes a chemical formula is complicated by being written as a condensed formula. Hydrochloric acid HCI Nitric acid HNO 3 Nitric acid HNO 3 Phosphoric acid H 3 PO 4 Phosphoric acid H 3 PO 4 Sulfuric acid H 2 SO 4 Sulfuric acid H 2 SO 4 Boric acid H 3 BO 3 Boric acid H 3 BO 3 Hydrofluoric acid HF Hydrobromic acid HBr Perchloric acid HClO 4 Perchloric acid HClO 4 Wikipedia

4. Properties of acid The properties of acids are, they are sour to taste, they can react with some metals and produce hydrogen gas, they can cause some organic things to change color, they cause a reaction with limestone that creates carbon dioxide, and they react with bases to produce water and salts. HCI,HNO 3 and H2SO4

5. Bases Bases are substances that react with acids and neutralise them. They are usuall metals like:Oxides, hydroxides, carbonates or hydrogen carbonates. Many bases are insoluble = they do not dissolve in water. If a base does dissolve in water, we call it an alkali. Wikipedia

6. Acids An Acid is a compound which usually is having a sour taste and it is neutralizing alkalis and reddening blue litmus (litmus paper is also sometimes yoused for drug test to proof if someone has taken them) paper is, containing hydrogen that can be replaced by a metal or an electropositive group to form a salt, or containing an atom that can accept a pair of electrons from a base. Wikipedia