Chapter 10 - Acid-base (proton transfer) reactions Flashcards
Acid
species that donates a proton, H+, during an acid-base reaction
Acid-base reaction
chemical reaction where a proton, H+, is transferred between two chemical species
Alkali
a base that is soluble in water and neutralises acids
Amphiprotic
species that can either donate or accept a proton, H+
Base
species that accepts a proton, H+, during an acid-base reaction and are a group of substances that neutralise acids
Brønsted-Lowry theory
definition of an acid as a chemical species which donates a proton, H+, to a base
Corrosive
a highly reactive substance that causes obvious damage to tissue
Deprotonation
loss of a proton, H+, from an acid
Diprotic
species that can donate up to two protons, H+, during ionisation
Hydronium ion
positively charged chemical species with molecular formula H3O+
Hydroxide ion
negatively charged chemical species with molecular formula OH−
Ionisation
process by which a chemical species gains or loses an electron to gain an electric charge
Monoprotic
species that can only donate one proton, H+, during ionisation
Neutralise
react with an acid or a base to produce water
Polyprotic
species that donates multiple protons, H+, during ionisation
Protonated water
alternate name for the hydronium ion, H3O+
Strength
how readily an acid or base will donate or accept a proton, H+
Triprotic
species that can donate up to three protons, H+, during ionisation
Antacid
a weak base that is used to neutralise stomach acid
Heartburn
a burning sensation in the chest, caused by acid regurgitation into the oesophagus
Indigestion
pain or discomfort in the stomach
Metal hydroxide
compound that neutralises acids to form a salt and water
Metal carbonate
compound that neutralises acids to form a salt, water and carbon dioxide
Metal hydrogencarbonate
compound that neutralises acids to form a salt, water and carbon dioxide
Neutralisation reaction
a reaction between an acid and an alkali or base that forms a salt and water (and carbon dioxide when a metal carbonate is a reactant)
Ulcer
a break in the lining of an organ like the stomach
Acidic solution
solution containing a greater concentration of hydronium ions than
hydroxide ions
Autoionisation
process by which an atom or molecule spontaneously forms ions
Basic solution
solution containing a greater concentration of hydroxide ions than hydronium ions
Ionic product of water
Kw, expression of the concentration of ions present in water at 25 °C
Neutral solution
solution containing an equal concentration of hydronium and hydroxide ions
pH
measure of the concentration of hydronium ions in a solution
pH scale
pH values arranged on a logarithmic scale
Commercial indicator
an artificially prepared indicator
Indicator
a substance that changes colour to indicate a pH range
Litmus paper
paper used to indicate the acidity or basicity of a substance
Natural indicator
an indicator made from naturally sourced substances
pH meter
an instrument used to measure the pH of a substance
Combustion
when a fuel reacts with oxygen (also called burning)
Calcification
a chemical process that forms calcium carbonate
Decalcification
a chemical process that breaks down calcium carbonate
Carbonic acid
formed by the reaction of carbon dioxide and water
Exoskeleton
the outer shell of a marine creature that is made of calcium carbonate
Marine invertebrates
ocean and sea creatures that do not have a backbone
Nitric acid
can be formed from a series of reactions in the atmosphere between nitrogen gas, oxygen gas and water
Sulfuric acid
can be formed from a series of reactions in the atmosphere between sulfur, oxygen gas and water