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7. Acids, Bases & Salts

Cambridge IGCSE Chemistry (0620) · 8 topics

Properties of Acids & Bases

What are Acids? Acids are substances that release hydrogen ions (H⁺) when dissolved in water. They have a pH less than 7. Common acids: Hydrochloric acid (HCl)…
The Ions in Acids & Alkalis

Acids and Hydrogen Ions (H⁺) Acids release hydrogen ions (H⁺) when dissolved in water. These H⁺ ions are responsible for the characteristic properties of acids.…
Proton Transfer, Strong & Weak Acids

Proton Transfer Proton transfer is the movement of hydrogen ions (H⁺) from one substance to another during an acid-base reaction. According to the…
Classifying Oxides

What are Oxides? Oxides are compounds formed when elements react with oxygen. The type of oxide formed depends on whether the element is a metal or non-metal.…
Preparing Soluble Salts

What are Salts? Salts are ionic compounds formed when the hydrogen ions in an acid are replaced by metal ions or ammonium ions. They are produced by…
Preparing Insoluble Salts

What are Insoluble Salts? Insoluble salts are salts that do not dissolve in water. They form as solid precipitates when two soluble salt solutions are mixed.…
Solubility Rules

What is Solubility? Solubility is the ability of a substance to dissolve in a solvent (usually water) to form a solution. A substance is described as: Soluble -…
Hydrated & Anhydrous Salts

What is Water of Crystallization? Water of crystallization is water that is chemically bonded into the crystal structure of a salt. This water is part of the…