Even though it doesn't contain OH-, it's an alkali
NH3 + H2O = NH4OH (ammonium hydroxide/ ammonia)
NH4+ = Ammonium
PLants need N2 as it builds protein. They take N2 out from the soil so ammonium salts are used as fertilisers.
Substances that can react with acids and neutralise them to make a salt and water.
They are usually metal oxides or metal hydroxides.
Bases can accept a H+ and neutralise an acid
4 Neutral Solutions
have a pH of 7
4.1 how to test
they don't change the colour of litmus paper.
they turn universal indicator green.
4.3 H+(aq) + OH-(aq) = H20(l)
(the main reaction of this topic, the other elements are spectator ions as they are not taking place in a reaction)
Compound made from a neutralisation process
AgNO3(aq) + NaCl(aq) + AgCl(s) + NaNO3(aq)
AgCl = insoluble salt
5.1 Precipitation reaction
solid (insoluble salt) is formed by mixing 2 solutions
-filter and wash it
They can be used to remove unwanted ions in solution.
-useful for treating drinking water and waste water.