HI i have an exam on the preparation of salts.?

Question

THERE ARE SO MANY DIFFERENT TYPES OF METHODS AND I HAVE TO KNOW WHICH METHOD WILL BE EFFECTIVE.PLEASE HELP ME

Answer 1

Salts are produced by the combining through some reaction mechanism of a cation (+) and an anion (-).

Acid/base neutralisations always produce a salt and water

Precipitation reactions produce an insoluble salt

Metals will also react with acids to produce hydrogen and the metal salt of the acid

Organic salts are produced by the partial reaction of an ester around the hydrogen part of the OH group, where there is a propensity for the H+ to be displaced by M+ where M is any metal of equivalent charge.

Answer 2

I'd love to help, Angel, but it's been too long since I knew this particular area of chemistry. I know only two for sure. One is acid plus base gives a salt plus water. Evaporate the water (being careful not to affect the salt with the heat) and you're left with the salt. The other way I remember is acid + metal. This doesn't always give hydrogen gas as a product, especially if the acid anion contains oxygen atoms. For example, a standard chemistry class demonstration adds nitric acid to copper metal. A brown gas appears, which is one of the oxides of nitrogen. So the products are nitrogen oxide (forgotten which one - there are five!), water, and green copper nitrate (when the water is evaporated).

Answer 3

1. precipitation (for insoluble salts)
2. neutralisation (both reactants soluble, and one is an acid, and the other an alkali)
3. reaction of excess insoluble metal, metal oxide, hydroxide or carbonate with acid.