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Why hcl and hno3 cannot be used instead of h2so4


Nov 30, 2023

Why is it wrong to substitute H2SO4 in the titration with HNO3 and HCl?

HCl and HNO3 are not used in the titration of Mohr’s salt in place of sulfuric acid because: … HNO3 is also a powerful oxidizing agent along with KMnO4 so it also plays its role in oxidation which causes a decline in the value of KMNo4 used.

Why H2SO4 is used instead of HCl?

Sulfuric acid is used because it is stable towards oxidation; whereas, for example, hydrochloric acid would be oxidized to chlorine by permanganate.

Why don’t we use HCl and HNO3 during titration for acidification?

The acid used in this titration is dilute sulphuric acid. Nitric acid is not used as it is itself an oxidising agent and hydrochloric acid is usually avoided because it reacts with KMnO4 according to the equation given below to produce chlorine and chlorine which is also an oxidising agent in the aqueous solution.

What will happen if hydrochloric acid is used instead of sulphuric acid?

Since HCl is slightly less acidic than H2SO4, it will act like a base and accept a proton. And since HCl in solution consist of H3O+ and Cl-, Cl- will become protonated to become HCl(g).

Why HCl Cannot be used to acidify KMnO4?

KMnO4 is a very strong oxidizing agent and it can oxidize HCl to liberate chlorine gas, therefore HCl cannot be used to acidify potassium permanganate solution in volumetric analysis.

Why HCl is not used in titration of KMnO4?

Hydrochloric acid (HCl) is usually not used in the process of titration because it reacts with the indicator potassium permanganate (KMnO4) that is used in the process. It reacts with KMnO4 solution and gets oxidized which further results in the liberation of chlorine gas.

Can you mix HCl and H2SO4?

Mixing HCl and H2SO4 is a deadly mistake. The mixture is known as Aqua Regia, because it can even dissolve pure GOLD metal that is one of the most chemically inert substances known to man.

Is HNO3 an acid?

Nitric acid is a nitrogen oxoacid of formula HNO3 in which the nitrogen atom is bonded to a hydroxy group and by equivalent bonds to the remaining two oxygen atoms. It has a role as a protic solvent and a reagent. It is a conjugate acid of a nitrate.

What is the difference between muriatic acid and sulfuric acid?

Muriatic acid and sulfuric acid are very different chemical compounds. Muriatic acid has the formula HCl, while sulfuric acid has the formula H2SO4. What this means is that sulfuric acid molecules have two hydrogens, one sulfur and four oxygens, while muriatic acid molecules have one hydrogen and one chlorine atom.

What does HNO3 and H2SO4 do?

Sulfuric acid protonates nitric acid to form the nitronium ion (water molecule is lost). The nitronium ion is a very good electrophile and is open to attack by benzene. Without sulfuric acid the reaction would not occur.

Which acid is stronger HCl or H2SO4 or HNO3?

HCl is the strongest acid (indicated by the lowest pKa) followed by H2SO4 and HNO3. H3PO4 is the weakest of the acids.

Which is stronger HCl or H2SO4?

HCl is a stronger acid than H2SO4 because a proton more easily separates from chloride ion than from hydrogen sulphate ion and this is reflected in their dissociation constants.

Is HNO3 stronger than H2SO4?

Strength or acidity of an acid depends on how easily it loses its proton(s) in aqueous environment. Dissociation constant of H2SO4 (pKa=-3) is more negative than that of HNO3 (pKa=-1.38) that means H2SO4 releases protons more easily than HNO3. Therefore H2SO4 is stronger acid that HNO3.

What happens when benzoic acid reacts with conc HNO3 and H2SO4?

When benzoic acid reacts with concentrated nitric and sulphuric acid, it forms m-nitrobenzoic acid. Benzoic acid is an aromatic compound containing carboxylic acid as a functional group.

What is the role of HNO3 in nitrating mixture used for nitration of benzene?

HNO3 acts as a base in the nitrating mixture and provides the electrophile NO2+ .

Is HCl stronger than HNO3?

Yes, hydrochloric acid is stronger than nitric acid. This is due to the deprotonation of hydrochloric acid in aqueous form. This makes hydrochloric acid stronger than nitric acid.

How can you identify HCl H2SO4 and HNO3?

With barium chloride solution sulphuric acid will give white precipitate while hydrochloric acid and nitric acid will not give any precipitate.

Is HNO3 stronger than HNO2?

HNO3 is stronger acid than HNO2. Reason. In HNO3 there is two nitrogen to oxygen bonds whereas in HNO2 there is only one. A.

Why HNO3 is stronger acid than HCl?

There is so much more to acids and bases than pH and pKa and strong vs. weak. This means HCl in an aqueous solution is more deprotonated than HNO3, and so HCl is a stronger acid than HNO3. That’s it.

Which is stronger oxidizing agent HNO3 or H2SO4?

So, with respect to the first pKa for H2SO4, H2SO4 is a stronger acid than HNO3. For pKa2 (HSO4-) it is a weaker acid. But, it is the first pKa that is important, H2SO4 wins on the basis of pKa.

Is HNO3 strong or weak?

The 7 common strong acids are: HCl, HBr, HI, HNO3, HClO3, HClO4 and H2SO4 (1st proton only).

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