Question

with what things an acid forms?

Answer 1

Acids form aqueous solutions with a sour taste, can turn blue litmus red, and react with bases and certain metals (like calcium) to form salts.
· In order to be acidic then, a substance must contain hydrogen, in a form that can be released into water.

Answer 2

HOLA KID!!
Rajdeep here....

There are many ways by which an acid can be formed.

Acids can be formed by reacting the acid anhydrides (acidic oxide) with water.
Example:
NO₂ + H₂O -------> HNO₂ + HNO₃
Cl₂ + H₂O -----> HCl + HClO
SO₂ + H₂O ------> H₂SO₃
SO₃ + H₂O -------> H₂SO₄
N₂O₅ + H₂O ------> HNO₃


Acids can be formed due to hydrolysis of a salt.
Example:
NaCl + H₂O -----> HCl + NaOH
KNO₃ + H₂O -----> HCl + KOH
CaCO₃ + H₂O ------> H₂CO₃ + Ca(OH)₂
Mg₃(PO₄)₂ + H₂O ------> H₃PO₄ + Mg(OH)₂

Tests for acids:
Acids turn blue litmus red.
Acids turn methyl orange pink from orange.
Colour of phenolphthalene remains colourless in presence of acids.

Chemical tests:
Dilute acids, when react with active metals like K, Na, etc, liberate hydrogen gas, which burns with a pop sound in air.

Acids, when react with metallic carbonate or bicarbonate salt, produces carbon dioxide gas which turns lime water milky.

Acids, when react with metallic sulphite or bisulphite salts, produce sulphur dioxide gas which shows bleaching property as well as turns acidified potassium dichromate solution green (from orange).



HOPE MY ANSWER IS SATISFACTORY....
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