CHEM 1A03 Chapter Notes - Chapter 4: Sodium Bicarbonate, Hong Kong Diploma Of Secondary Education, Trioxidane

• School: McMaster University
• Department: Chemistry
• Course: CHEM 1A03
• Professor: David Brock

Document Summary

Acid: a covalent molecular compound that dissolves in water to give h+(aq) as only cation. Base: a compound that reacts with an acid to form a salt and water. Strength of acid/alkali: extent of dissociation (e. g. hcl(aq) h +(aq) + cl-(aq)) in water. Strong acid/alkali: acid/alkali that dissociates totally in water. Weak acid/alkali: acid/alkali that dissociates slightly in water. Basicity of acid: number of hydrogen ions produced per molecule of acid. Colourless solution ph: negative logarithm of h+(aq) concentration ph = - log [h+(aq)] Acid/alkali in terms of ph: acidic if ph < 7 ([h+(aq)] > [oh-(aq)]), alkaline otherwise. Acid-base indicator: chemical that changes color with di"erent ph. Salt: compound formed when ionizable hydrogen atom(s) o fan acid is/are replaced by metallic/ammonium ion(s) Neutralization reaction: exothermic reaction in which an acid and a base react to form a salt and water only.