How many of you would consider reading a crime thriller or a detective spiel?
I am certain that at least some of you are ultraconservative when it comes to admiring this specific genre of publications! To some extent, bingeing on popular series based on murder mysteries has now become a huge hit among the millennials who are more bound to OTTs of late.
Let me set up a plot for you! A series of disappearing celebrities have been haunting the city cops. They seemed to have been bungling at cracking the case. In fact, the biggest question is- Whether these disappearing stars are dead, or alive. If dead, where are their corpses? With absolutely no clue, a detective is brought to the scene!
Let’s now wrap it up quickly! He discovers that those disappearing celebrities were actually assassinated and to the ultimate horror, their corpse had completely been made to vanish by the killer, using the ‘King of Chemicals’- ‘Sulphuric acid’!
Yes! Indeed sulphuric acid is that powerful!
Well, in reality, several news magazines claimed, and it’s indeed a reality, that sulphuric acid in concentrated form is powerful enough to melt dead bodies completely into liquid. Experiments on pig carcasses, a typical substitute for human bodies, revealed that melting flesh in acid takes days, however, the process may be accelerated by adding water, which dissolves muscle and cartilage in 12 hours and transforms bone to dust in two days. True, this will make a body unrecognisable, but it will not entirely destroy it, at least not in minutes.
TABLE OF CONTENTS
Sulphuric Acid (H2SO4) is one of the major oxoacids among others like H2SO3, H2S2O7 and H2S2O8 etc. The most important and commonly used sulphur oxoacid is sulphuric acid.
Hydrogen sulphate, also referred to as sulphuric acid or oil of vitriol, is a colourless, viscous, caustic, and oily liquid. Due to the massive global production of sulfuric acid, it is referred to be the "king of chemicals."
Jabir ibn Hayyan discovered sulphuric acid in the eighth century. Sulphuric acid consumption per capita has been used to gauge a country's technical progress. The United States, the world's top producer, produces well over 39 billion kg every year. In terms of quantity, it is the most cost-effective acid.
Industrially, H2SO4 (hydrogen sulphate) is formed by reacting water with SO3, which is created by mixing sulphur dioxide and oxygen in a chemical reaction known as the contact or chamber process.
Sulphuric acid is a sulphur oxoacid with two oxo and two hydroxyl groups covalently attached to a central sulphur atom. Sulphur is at the centre of a tetrahedral molecule. In sulphuric acid, sulphur is present in its maximum oxidation state, +6. It is a diprotic acid because it can dissociate to give two H+ ions. Its n-factor is 2.
H2SO4 ⇌ 2H++SO42-
S(s) + O2 (g) → SO2(g)
conc. H2SO4 + SO3(g) → H2S2O7(l) [Oleum]
H2S2O7(l)+H2O (l) → 2H2SO4
Cu (s) + 2H2SO4 (conc.) → CuSO4(aq) + SO2(g) + 2H2O (aq)
S (s)+ 2H2SO4 (conc.) → 3SO2(g) + 2H2O (aq)
C(s) + 2H2SO4(conc.) → CO2(g) + 2SO2(g) + 2H2O (aq)
H2SO4 (aq) + H2O (𝓁) ⇌ H3O+ (aq) + HSO4-(aq) Ka1= very large (K> 10)
HSO4- (aq) + H2O (𝓁) ⇌ H3O+ (aq) + SO42- (aq) Ka2= 1.2 × 10-2
Q 1. The formula of Oleum is expressed as
Answer: SO3 reacts with concentrated H2SO4 to give oleum.
Conc. H2SO4 + SO3(g) → H2S2O7 (l) [Oleum].
So, option B) is the correct answer.
Q 2. Name some explosives manufactured using sulphuric acid.
Answer: Explosives manufactured using sulphuric acid are nitroglycerine, trinitrotoluene, and gun cotton. Sulfuric acid is non-combustible, but it is a strong oxidiser that helps other substances burn more efficiently. It is an important sulfonating agent. Also, a mixture of nitric acid and sulphuric acid in concentrated form is used as a nitrating agent which is used to add -NO2 to a benzene ring.
Q 3. From ancient times, sulphuric acid is also famous as
a. Blue Vitriol
b. Oil of Vitriol
c. Caro’s Acid
d. None of the above.
Answer: H2SO4 is also called as oil of Vitriol. Caro’s acid is H2SO5. Blue vitriol is CuSO4.5H2O.
So, option B) is the correct answer.
Q 4. Concentrated Sulphuric acid is a good
a. Dehydrating agent
b. Hygroscopic agent
c. Oxidising agent
d. All of the above
Answer: Sulphuric acid undergoes intermolecular hydrogen bonding with water. It has a strong affinity for polar water molecules. So, it is a very good dehydrating as well as a hygroscopic agent. Sulphur is in its highest oxidation state of +6. So, it acts as a strong oxidising agent.
So, option D) is the correct answer.
Q 1. How dangerous is sulphuric acid?
Answer: The corrosive compound hydrogen sulphate (sulphuric acid) is harmful to the skin, eyes, teeth, and lungs. Severe H2SO4 exposure can potentially result in death. Workers can be harmed by hydrogen sulphate exposure. The dose, duration, and type of job performed determines the extent of exposure.
Q 2. Why is acid rain containing sulphuric acid harmful?
Answer: If pollution and acid rain were not present, most ponds and lakes would have an pH of around 6.5. Acid rain, on the other hand, has caused many ponds and lakes to have substantially lower pH levels. Furthermore, aluminium that is released into the soil eventually ends up in ponds and lakes. For aquatic animals, the increase in aluminium levels and acidity can be harmful.
Q 3. How is sulphuric acid useful in the paint industry?
Answer: Paints and pigments are made with sulphuric acid. Sulphates, such as barium and lead sulphates, are common pigments in paintings.
H2SO4 (dil.)+BaCl2 (aq)→BaSO4 (s)↓+2HCl (aq)
Q 4. How is sulphuric acid utilised in metallurgy?
Answer: Sulphuric acid is often employed in the bath in metallurgical operations for the purification of metals by electrolysis. In metallurgy, sulphuric acid is used to convert metals to their sulphates, which are subsequently electrolyzed. In metallurgy, sulphuric acid is used to convert metals to their sulphates, which are subsequently electrolyzed.
Modern Periodic Table