Home > Community > What is the result when potassium nitrate is heated with concentration sulfuric acid? What is the correct equation?
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Lameck Fimbo

What is the result when potassium nitrate is heated with concentration sulfuric acid? What is the correct equation?

Cielito Lindo  Follow

See there can be 2 products

1: If Temperature is less than 200 ° C

NaNO3 + H2SO4 →NaHSO4 + HNO3

( Process of nitric acid preparation)

2: If Temperature is more than 200°C

NaNO3 + H2SO4 → Na2SO4 + HNO3

Na2SO4 sticks to glass vessel , difficult to remove as it sticks to glass , it may cause the glass to crack , and there unnecessary wastage of fuel …

:) Hope you like my answer….

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Chris Sherwood  Follow

Typically, sulfuric acid is available at 98–99%, but sulfuric acid with an excess of SO3 is available. This is called “pyro sulfuric acid”, or oleum.

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Dan Lazuran  Follow

Potassium nitrate (KNO3) is a neutral salt formed by nitric acid (HNO3), which is a strong acid, and a strong potassium base such as KOH. Hence, KNO3 cannot undergo hydrolysis and will not react with HNO3 as an acid-base neutralization reaction.

Also, KNO3 and HNO3 have the same ion, NO3-, and therefore, will not exchange ions when mixed together.

So nope. They don’t react.

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Dennis Sardella  Follow

When it comes to sulfuric acid, dilute sulfuric acid is stronger than a concentrated one. If you go to any industry, you will find that they are storing concentrated acids in stainless steel tanks and the concentration of the acid is not allowed to fall below 95%. This is because when concentrated acid comes in contact with an iron surface, it reacts to produce sulphates of iron which render the rest of the iron impassive thus protecting it. However, were you go on diluting it, a rather porous deposition develops on the steel walls. This promotes attack by the acid. Also, the activity of sulfuric acid increases with dilution. In case of weaker acids, the dissociation increases with dilution, which means that as more and more water is added, more hydrogen ions will be generated. By and large, dilute sulfuric acid is more harmful than concentrated sulfuric acid.

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Barry F  Follow

When the mixture of potassium nitrate and concentrated sulfuric acid is heated in a retort nitric acid vapour will be evolved, another product will remain in the retort. The evolved nitric acid is collected in a flask, on cooling liquid nitric acid is obtained.

KNO3 + H2SO4 = KHSO4 + HNO3

Hope this helps.

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Deirdre Rose  Follow

This is something I've done many times. You would mix potassium nitrate and sulfuric acid when you had lots of each reactant and wanted to make nitric acid which is often harder to get a hold of. When you mix potassium nitrate and sulfuric acid, you actually get a mixture of sulfuric acid, potassium nitrate, nitric acid, and potassium bisulfate. Add heat and the reaction goes to completion with the sulfuric and potassium nitrate being consumed. By itself, you have a mixture of acids anf salts, but if you distill this mixture, the condensate is fairly pure nitric acid.

Sulfuric acid plus potassium nitrate goes to potassium bisulfate and nitric acid.

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Chuck Britton  Follow

HCl(aq)+H2SO4(aq)->HCl(g)+H2SO4(aq)

When conc HCl reacts with conc H2SO4 there will be no different end product the only change in product is that the phase change in HCl from aqueous to gaseous state .

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