Such substances are semi-metals as Zn,Sn and Al , and their oxides, such substances are known as Amphoteric.
Yes :)
The process is called saponification, with which you make soap.
Nitric acid reacts strongly with many metals.
Metallic magnesium reacts violently with acids.
Chemical Property
Alkalis (bases) react with acids to neutralize them, so in one sense, they can be considered as "opposite" of acids. Bases produce pH values >7 and acids produce pH values <7.
Yes, that is called a neutralization reaction.
Yes :)
Metalloids react with both acids and alkalis.
Soap
Aluminium is not an acid or a base, but it does react with both acids and alkalis.
No, not always (opinion). So check on the internate
An acid has a pH level below 7, whilst an alkali has a pH level above 7. Acids contain H+ ions and alkalis consist of OH- ions. Acids turn litmus paper red, alkalis turn it blue. When acids react with metals they form hydrogen and a salt. Acids a sour to taste. Alakalis react with acids to form salt and water, a reaction called neutralisation. Alkalies feel soapy to touch. All alkalis except ammonia will react with ammonium compounds, driving ammonia out.
Acids react with metals to evolve H2 gas
Copper doesn't react wih alkalis.
Magnesium does not seem to react with dilute aqueous alkalis or bases. However, it does react with acids like sulfuric acid by dissolving in it.
Acids will react with carbonates to produce a gas (CO2), alkalis won't.Acids will react with magnesium or any active metal but Mg is fast, alkalis won't. An acid + active metal produces hydrogen gas.Acids will clean a coin, alkalis won't.Alkalis feel slimy but acids don't. Only try this if the alkali and acid are diluted with water, and you wash your hands well afterwards.In summary:Acid + Carbonate --> Salt + Carbon dioxide + WaterAcid + Active Metal --> Salt + Hydrogen