Solubility Noadswood Science, 2012
Wednesday, April 26, 2017 Solubility To understand the terms soluble and insoluble and be able to represent the formation of different salts using word equations
Solubility The solubility of a compound eliminates a lot of ionic compounds (e.g. oxides, hydroxides and carbonates are all insoluble in water) Add a very small amount of the substance to some distilled water in a boiling tube and shake Allow it to settle and record what the contents looks like If it is transparent the substance is soluble If it is cloudy the substance is slightly soluble If there is no change the substance in insoluble
Solubility For many chemical tests the substance needs to be in a solution… Add a spatula of the sample + some distilled water into a boiling tube and shake Repeat until no more sample can dissolve Poor the solution through some filter paper to remove the excess solid
Acid + Base Salt + Product X Salt Production How are salts made? When an acid reacts with a base a neutralisation reaction occurs producing a salt (a base can be soluble or insoluble, and a soluble base is called an alkali) Acid + Base Salt + Product X Product X depends on what base is used – it could be water, hydrogen or carbon dioxide + water…
Acid + Base Salt + Product X Salt Production Acid + Base Salt + Product X Acid + Alkali Salt + Water Acid + Metal Salt + Hydrogen Acid + Metal Hydroxide Salt + Water Acid + Metal Oxide Salt + Water Acid + Carbonate Salt + Carbon Dioxide + Water
Naming The name of the salt depends on the names of the reactants… The first part of the salt’s name comes from the base The second part of the salt’s name comes from the acid E.g. sodium hydroxide base will give sodium… E.g. sulfuric acid will give …sulfate *Sodium hydroxide neutralising sulfuric acid produces sodium sulfate salt
Experiment Your task is to mix hydrochloric acid with the different bases and work out the salt (and product x) you have produced… Hydrochloric acid + Sodium hydroxide Hydrochloric acid + Potassium hydroxide Hydrochloric acid + Copper oxide Hydrochloric acid + Calcium oxide Hydrochloric acid + Ammonium hydroxide Hydrochloric acid + Magnesium Hydrochloric acid + Calcium carbonate
Experiment Your task is to mix hydrochloric acid with the different bases and work out the salt you have produced… Hydrochloric acid + Sodium hydroxide sodium chloride + water Hydrochloric acid + Potassium hydroxide potassium chloride + water Hydrochloric acid + Copper oxide copper chloride + water Hydrochloric acid + Calcium oxide calcium chloride + water Hydrochloric acid + Ammonium hydroxide ammonium chloride + water Hydrochloric acid + Magnesium magnesium chloride + hydrogen Hydrochloric acid + Calcium carbonate calcium chloride + carbon dioxide + water