what makes up acid acidic?

Question

What made them burn or melt metals or things...? please... asap...

Answer 1

basically an acid is acidic because of presence of [H]+ ions.these [H]+ are very vigorous and instantly react with [o]-- that are present.as we know that oxygen gas can split into ions in special cases,they split and combine with [H]+ and form oxyhydrogen flame that is around 2600 degrees celcius.this flame melts the metals and makes then easy to react with leftover anion.

Ex:if we observe the reaction,
HCl+Zn-----------ZnCl2 +H2
we can divide it as
HCl-----------[H]+ +[Cl]-
o2-----------2[o]--
these [H]+ and [0]-- ions produce oxyhydrogen flame and melt the metal and render them to react with leftout anion ie [cl]-
hence
Zn+2[cl]- ---------ZnCl2
as all these changes occur within a fraction of second,we cannot observe anything and it appears normal to us

Answer 2

An acid is a proton donor (Bronsted definition) in water an acid will donate a proton to the water molecules making hydroxonium ions eg HCl + H2O -> H3O+ + Cl- so that you may also say that an acid is a substance that makes hydroxonium ions (Hydrated H+) in answer in water. A substance will lose H+ if the bond is rather susceptible (eg H-Cl) or if the anion also formed is stabilised by ability of delocalisation (eg HNO3) by ability of definition acids will react with bases (proton acceptors ) yet H3O+ is likewise an oxdising agent. centred sturdy acids are dehydrating brokers (H2SO4). in spite of the undeniable fact that different issues, particularly alkalis, may be both detrimental.

Answer 3

Acids can donate H+
H+ ions can decrease the pH of a susbtance.
pH = -log [H+]

So the stronger the acid the greater its ability to decrease the pH value of the substance thus giving the characteristic of acids which is the burning and melting.
Burning is accounted for when for example acid meets the water (H2O) in the hand it forms H3O+

And melting is due to the exothermic reaction of H+ ions that were released being added to another substances. since rxn is exothermic, energy is going to be given off and it is this energy that melts metal and things as you said

Answer 4

becasue typically acid (HCl) can react with some metals (like iron) to form H2 and salt, whick make melt (solution). if too much heat is released meanwhile, H2 will burn.

Answer 5

same answer of above
do u want me repeat the same answer?

Answer 6

because, presence of SALT.