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Chemistry St Peters2

Acids and Bases Key Words

QuestionAnswer
hydrated protons In aqueous solution, water molecules surround the hydrogen ions (protons) to keep them in solution. This is called hydration. Hydrated protons are represented as H+(aq).
proton donor Acids are proton donors.
proton acceptor Bases react with protons and so are called proton acceptors.
ionise Particles or atoms become positively or negatively charged in solution
neutralisation Reacting an acid and an alkali to form salts and water to reach a pH of 7.
titration Titrations can be used to find the volumes of acids and alkalis that react completely.
indicator A suitable indicator is used to show the end point of a titration. ( Universal, phenolphthalein, methyl orange.)
end point The end point of the titration is when the acid and alkali have reacted completely.
mol per dm3 moles per decimetre cubed - how many moles of solute are dissolved in 1 cubic decimetre of solvent.
g per dm3 grams per decimetre cubed - how many grams of solute are dissolved in 1 cubic decimetre of solvent.
mole A mole is the relative formula mass of a substance in grams.
relative atomic mass The combined relative masses of all the atoms in a compound.
strong acid A strong acid, such as hydrochloric, sulphuric and nitric acids, ionise completely when they dissolve in water.
weak acid A weak acid will only partially ionise in water, such as ethanoic or citric acid.
strong alkali A strong alkali, such as sodium hydroxide, will ionise fully in aqueous solution.
weak alkali A weak alkali, such as ammonia, will only partially ionise in aqueous solution.
acid When acids dissolve in water they produce hydrogen ions (H+ ions) in solution.
alkali Alkalis are soluble bases that produce hydroxide ions (OH- ions) in solution.
base A substance which will neutralise an acid but is not in solution.
Created by: sallyfizz