The hydroiodic corrosive also called the hydronic corrosive is tasteless gas, which changes the Lakmus into a reddish colour, and produces thick white exhaust in the wet air. The compound equation for hydroiodic corrosive is Hi. Hydroiodic acid is solid acid made by dissolving iodide hydrogen in water. However, the difference is one gas, and the other is water.
It is one of the strongest of all ordinary halide acids because of the conjugate base's high stability. It is also called hydrogen iodide and iodane.
Properties of Hydroiodic Acid
| Particulars |
Values |
|---|---|
| HI |
Hydroiodic acid |
| Density |
1,700 g/cm³ |
| Molecular Weight/ Molar Mass |
127.911 g/mol |
| Boiling Point |
-35.36 °C |
| Melting Point |
-51 °C |
| Chemical Formula |
HI |
Structure of Hydroiodic Acid
Hydroiodic Acid Physical Properties
- Have a pungent odour
- Colourless liquid appearance
- Having covalent bond=1
- The heat of evaporation is 17.36 kJ/mol @ 25 deg C
- Have a hydrogen bond donor as 1
- Soluble in water
Hydroiodic Acid Chemical Properties
- Hydroiodic corrosive responds with seething nitric corrosive structures iodine, nitrogen oxide, and water. The compound condition is given below.
2HNO3 + 6HI → 2NO + 3I2 + 4H2O
- Hydroiodic corrosive responds with a base say sodium hydroxide structures sodium iodide and water. The substance condition is given below.
HI + NaOH → NaI + H2O
- Hydroiodic acid reacts with oxygen in the air to give iodine:
4 HI + O2 → 2 H2O + 2 I2
Like other hydrogen halides, hydroiodic acid adds to the alkene to give alkyl iodide. It can also be used as reducing agents, for example in reducing aromatic nitro compounds to Aniline
Hydroiodic Acid Uses
- Used in the assembling of iodides and as a diminishing specialist and in disinfectants and drugs.
- Used as one of the essential wellsprings of iodine in natural and inorganic blends.
- Hydroiodic corrosive furthermore of potassium iodide, a consistent decision as a wellspring of a nucleophile in ketal deprotection.
In Class 11: In the chapter Redox Reaction, the acid has been discussed in depth with its reactions, usage, and properties in everyday chemistry. It has a weightage of 20 Marks.
Illustrated Examples
- The propionic corrosive is exposed to decrease with hydroiodic corrosive within the sight of a little P. The item that we will get accordingly may be:
Propane
[H+] = 10-2.08 = 0.00832 mole/L
0.00832 mole/L X 0.775 L = 0.00645 mole HI
0.00645 mole HI X 127.9 g/mole = 0.824 g
- CH3)3COCH3 and CH3OC2H5 are treated with hydroiodic acid. What will be the result?
(CH3)3CI + CH3OH; CH3I + C2H5OH
- What will form when HI and HNO3 react?
FAQs on Hydroiodic Acid
Q. What are the health hazards of Hydroiodic acid?
Q. What about its electron affinity while creating the buffer?
In the acidic arrangement, arsenate, (AsO4)3−, is decreased to arsenite, though, in the emphatically soluble arrangement, iodine is unsteady, and the opposite response happens.
Q. What is the pH of the hydroiodic acid?
Q. What is the preparation of the acid?
2 I2 + NH2NH2 → 4 HI + N2
Hydroiodic corrosive is additionally set up by gurgling hydrogen sulfide gas through a watery arrangement of iodine.
H2S + I2 → 2 HI + S
Toward the finish of the response, HI is refined to give hydroiodic corrosive in the ideal fixations.
Q. Is Hydoiodic acid strong?
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