Question

9. How can metal salts be prepared from metals? Explain with an example.​

Answer 1

Answer:

For example, copper does not react with dilute acids, so copper salts are made using copper oxide or copper carbonate, not copper metal. ... As the reaction between metals and acids produces flammable hydrogen, chemists usually make salts by reacting a metal oxide or a metal carbonate with an acid

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Answer 2

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Metal salts are formed when a metal replaces the hydrogen of an acid. From a reaction of a metal with hydrochloric acid (HCl) we get chlorides, and from a reaction of a metal, or metallic compound, with sulfuric acid (H2SO4) we get sulfates, with phosphoric acid (H3PO4) yields phosphates, etc. When we have a reaction that replaces the hydrogen in an acid, we get a release of flammable (and explosive (still have a scar to prove latter)) which must be dealt with safely as in a submarine of WW2 era. When we have a lead-acid battery, or any other battery, we use the principle that different metals have different reactivities when an electrolyte is present. Salts are formed from the reaction, and this type of reaction is not confined to batteries like we use daily in devices. I have seen salts formed and metal parts destroyed in a recently manufactured front-loading washing machine where the drum is stainless steel (very low reactivity) and the huge gear on the rear of that drum is made from an alloy of aluminum and magnesium (very high reactivity at top of scale exceeded only by lithium, calcium, sodium ,and potassium). They have made a powerful battery with soapy water as an electrolyte which very quickly destroys the gear (turned into salts of those metals) and the owner must either pay for a $300 part or buy a new machine.

no! not all metals salts can be prepared by adding metal to an acid!!

the reaction of formation of metal salts from acid is carried out by the displacement

of H from its salt solution, by metal.

For this to happen, the metal must be more electro positive than the H .

But unfortunately, not all metals are more electro positive than H.

many transition metals like platinum, gold, etc are less electro positive than H.

So, those transition metals can't displace H and therefore its salt can't be prepared by adding acid.

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