- Created by: Annietta B
- Created on: 04-12-19 17:34
Acids and Alkalis
Acids- Substances producing more hydrogen ions than hydroxide ions when dissolved in water. Acids form acidic solutions in water. Acidic solutions have pH values less than 7. Acids produce hydrogen ions, H⁺ in aqueous solution. For example:
HCl(aq) → H+(aq) + Cl-(aq)
Alkalis- Substances producing more hydroxide ions than hydrogen ions when dissolved in water. Alkalis form alkaline solutions in water. Alkaline solutions have pH values greater than 7.Alkalis produce hydroxide ions, OH- in aqueous solution. For example:
NaOH(aq) → Na+(aq) + OH-(aq)
pH Scale- The pH scale measures the acidity or alkalinity of a solution. The pH of a solution can be measured using a pH probe, or estimated using universal indicator and a colour chart.