If you’re acquisition chemistry, you’ll indeed need to recognize the 7 strong acids.

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review this guide to discover what the 7 solid acids are, why castle important, and why they’re not necessarily the most dangerous mountain you’ll be working through in the lab.

What Is a solid Acid?

When an acid is labelled as a strong acid, it actually has nothing to do with how powerful or corrosive the is. The “strength” of one acid just refers to its ability to release hydrogen ions right into a solution. solid acids space acids that completely dissociate right into their ions in water. This means that, in a solution, every one of their molecules rest up. Solid acids productivity at the very least one hydrogen cation (H+) per molecule. Weak acids, top top the various other hand, will certainly dissociate much less than 1%, which means very couple of of their molecules will break as much as release a hydrogen ion.

Why is this important? It needs to do with chemical reactions. Here is the ionization reaction of the solid acid, hydrochloric acid:

HCl → H+ + Cl-

Notice exactly how there is a hydrogen ion in the product. All of the reactant (HCl) has actually been ionized during the reaction. Also notification that the reaction just proceeds in one direction. when the strong acid has been ionized, the reaction stops and also is not reversible.

Here is the reaction of ethanoic acid, a weak acid:

CH3COOH + H2O ⇆ H3O+ + CH3COO-

Notice below that the reaction arrowhead points in both directions. This means that the reaction proceeds in both directions, which isn’t the situation for strong acids. Weak acids just slightly disassociate, and also their hydrogen ions will continue to move in between being component of the weak acid and component of the water. This reaction is reversible and will turning back itself numerous times, reforming the acid.

In the next section, us list every 7 solid acids, and also we encourage you come memorize them. However, if girlfriend forget if an acid is solid or weak, friend can likewise look at its equilibrium constant/acid dissociation constant (Ka). solid acids will have big values because that Ka, if weak mountain will have very tiny values for Ka.


List of solid Acids

There are just 7 strong acids; all other acids are weak. They are detailed below by name and chemical composition.

Acid Name

Chemical Composition

Chloric acid


Hydrobromic acid


Hydrochloric acid


Hydroiodic acid


Nitric acid


Perchloric acid


Sulfuric acid


Strong acids vs concentrated Acids

It’s important to realize the strong/weak acids room not the exact same as concentrated/diluted acids. This terms are frequently misused and incorrectly substituted because that each other! The concentration the an acid refers to exactly how much water or solvent is in it. A concentrated acid has a small amount of water, if a diluted acid has actually a large amount the water in it. You have the right to have a strong acid that is diluted and a weak acid that is concentrated.

There’s no typical concentration the determines whether a substance is focused or diluted, but, in general, focused acids will have actually a pH approximately 3, while diluted acids will have actually a pH closer come 7.

Strong acids vs Corrosive Acids

Just since an mountain is strong doesn’t typical that the corrosive. Corrosiveness advert to how much a substance loss a surface ar it touches. Living tissue (such together skin, eyes, etc.) is often used together a reference allude since human being want come know any kind of potential risks of building materials they’re working with.

Some chemicals are so corrosive they deserve to eat far flesh and bone, but, again, the stamin of an acid isn’t connected to exactly how corrosive the is. The 2 terms measure up different, unrelated things. Some solid acids are an extremely corrosive, such as hydrochloric acid (which can eat with stainless steel) and also sulfuric mountain (which is typically used as a drainpipe cleaner). However, weak acids can likewise be extremely corrosive, such as hydrofluoric acid, which deserve to decalcify bone.

When corrosive acids space diluted, castle will frequently have less of a corrosive effect as result of their low concentration. In this case, they might only act together an irritant and cause milder reactions such together itchy or red skin.

Acids, oxiders, and also bases have the right to all it is in corrosive. The native “caustic” is sometimes used as a synonym because that corrosive, however it can only express to solid bases, not any type of acids.


Summary: list of solid Acids

There space 7 strong acids: chloric acid, hydrobromic acid, hydrochloric acid, hydroiodic acid, nitric acid, perchloric acid, and also sulfuric acid. Being component of the list of solid acids no give any type of indication of just how dangerous or damaging an mountain is though. The solid acids and also bases are just those that fully dissociate in water.

Weak mountain (which room all various other acids) dissociate just a little amount. An acid"s corrosiveness is a measure up of just how damaging that is to surfaces together as steel or skin. An acid can be solid but relatively safe to manage if it has a short corrosivity, yet weak mountain can additionally be very corrosive and very dangerous to occupational with if suitable safety precautions no taken.

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