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Acids and Bases
Arrhenius and Bronsted Lowry
Question | Answer |
---|---|
Common properties of Acids | They turn blue litmus red. They have a sour taste. They react with metals to release Hydrogen. |
Common properties of Bases | They turn red litmus blue. A base that dissolves in water is called an alkali. |
Arrhenius definition of an Acid | An acid is a substance that dissociates in water to produce H+ ions. |
Difference between a strong Arrhenius Acid and a weak Arrhenius Acid | A strong acid fully dissociates in water while a weak acid only partially dissociates in water. |
Dative Covalent Bond | A dative covalent bond occurs when one atom donates both electrons to the other atom it is bonding with. |
Arrhenius definition of a Base | A base is a substance which dissociates in water to produce OH- ions. |
Difference between a strong Arrhenius Base and a weak Arrhenius Base | A strong base fully dissociates while a weak base only partially dissociates |
Flaws in the Arrhenius System | 1: Arrhenius restricted his theory to acids and bases that dissolve in water. 2: Some acids and bases react in gaseous form with no solvent required. 3: It is the hydronium ion not H+ that exists in solution. |
Formula of a Hydronium Ion | H30+ |
Bronsted-Lowry theory of an aicd/base | An acid is a proton donor. A base is a proton acceptor. |
Exception to Acid and Bases | Ammonia can either accept or donate protons and can be classified as either an acid or a base. A substance like this is known as amphoteric. |
Conjugate Acid/Base Pairs | A conjugate acid/base pair is any pair of an acid and a base that differ by 1 proton |
What does an acid become when it donates a proton? | Conjugate base |
What does a base become when it accepts a proton? | Conjugate acid |
Neutralisation | Neutralisation occurs when an acid and a base react to form a salt and water. |
Definition of a "salt". | A salt is formed whenever the hydrogen from an acid is replaced by a metal or an ammonium ion. |
Examples of Neutralisation | 1: Medicine: Antacids contain Sodium Hydrogen Carbonate. 2: Farming: Calcium Oxide added to acidic soil. 3: Environmental: Limestone added to acidified lakes 4: Toothpaste: reacts with the acid produced by bacteria. |