Aqueous Solutions

• Some solutes exist as molecules when dissolved in water (sugar, ethanol)

• Many solutes dissociate or form ions in water

• Acids form H+ ions; bases form OH - ions so mixing an acid and base will produce a salt and water

Double Replacement Rxns

• Involve solutions (aq) with a salt dissolved in water.

• Both reactants will be aqueous and one product will be aqueous

• Other product will be a precipitate (solid), water (liquid) or gas

• The product that remains aqueous really hasn’t reacted or changed, so we can simplify the equation

Ionic Equations

• Substances that are ions in the equation are written as ions (not compounds)

• Complete ionic equation = shows all of the ions involved

• Net ionic equation = shows only the ions that “participate” in the reaction

• Spectator ions = ions that don’t participate in reaction (show up on both sides)

Try ItWrite a chemical, complete ionic and net ionic equation for:

Aqueous solutions of sodium carbonate and manganese (V) chloride are mixed, forming the precipitate manganese (V) carbonate.

Try ItWrite a chemical, complete ionic and net ionic equation for:

Sulfuric acid (H2SO4) and aqueous potassium hydroxide form water and another product.

Try ItWrite a chemical, complete ionic and net ionic equation for:

Nitric acid (HNO3) reacts with aqueous rubidium sulfide to form gaseous hydrogen sulfide and aqueous rubidium nitrate.