Difference Between solid and Weak acid

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Acids are chemistry substances the donate hydrogen ions or protons when combined in solutions. The number of protons offered off by a certain acid actually determines the toughness of the acid – even if it is it is a strong acid or a weak acid. In stimulate to know the toughness of the acids, one have to compare their propensity to donate proton to the comparable base (mostly water). The strength is denoted by a number called pKA.

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What is a solid acid?

An acid is said to be solid if that dissociates or ionizes completely in a solution. The means, the is maybe to provide the largest variety of H+ ions or protons when blended in a solution. This ions are the charged particles. Due to the fact that a solid acid donates a greater number of ions together it breaks down, or ionizes, that way a solid acid is a conductor the electricity.

When an mountain mixes in H2O, a proton (H+ ion) is brought to a H2O molecule to create a H3O+ (Hydroxonium ion) and a – ion based on which acid is involved to start with.

In a basic scenario,

Such chemistry reactions can be revered, yet in few cases, the acid is offers away H+ ion rather easily and also the reaction looks favor being one-way. And the acid is complete dissociated.

For e.g., as soon as hydrogen chloride disappear in H2O to make HCl, so little of the reverse reaction happens that we can write:

At one time, hundreds percent digital reaction will take location wherein hydrogen chloride will display reaction through H3O+ (Hydroxonium ion) and Cl– ions. Here, the strong acid is Hydrogen Chloride.


What is a Weak acid?

An mountain is claimed to be weak if it ionizes partially or incompletely, giving off only some that its hydrogen atoms right into the solution. Hence, it is less capable as compared to a solid acid in providing off protons. Weak acids have higher pKa than strong acids.

Ethanoic acid is a great example the a weak acid. It mirrors reaction with H2O for creating H3O+ (Hydroxonium ions) and also CH3COOH (ethanoate ions), but the reverse reaction shows an ext success than the forward one. The molecules react quite conveniently to ameliorate the acid and the H2O.

At any type of one time, only about one percent the the CH3COOH acid molecules show conversion into ions. Everything is left is the straightforward acetic acid (systematically called ethanoic acid) molecules.

Difference between solid acid and Weak acid


Strong acid

A solid acid is an mountain that ionizes totally in one aqueous solution. A solid acid will certainly always loosened a proton (A H+) when dissolved in H2O. In various other words, a strong acid is constantly on that toes and also quite efficient in providing off protons.

Weak acid

A weak acid is one the ionizes partially in a solution. It gives off only few of that hydrogen atoms in come the solution. For this reason it is less capable than a solid acid.

Electrical conductivity

Strong acid

Strong acids will constantly show solid conductivity. Solid acids typically pass an ext current as contrasted to the weak acids because that the exact same voltage and also concentration.

Weak acid

Weak acids have actually a short conductivity. Castle are negative conductors and show a low worth for current passing

Rate the reaction

Strong acid

Rate the reaction is quicker in the strong acids

Weak acid

Rate of reaction is slower in weak acids


Strong acid

Hydrochloric acid (HCl), Nitric acid (HNO3), Perchloric mountain (HClO4), Sulfuric acid (H2SO4), Hydroiodic mountain (HI), Hydrobromic acid (HBr), Chloric mountain (HClO3).

Weak acid

Sulfurous mountain (H2SO3), Acetic mountain (CH3COOH), Phosphoric acid (H3PO4), Benzoic mountain (C6H5COOH), Hydrofluoric acid (HF), Formic acid (HCOOH), Nitrous acid (HNO2).


Strong acid

In a solid acid, the pH is reduced than, usually 3. Strong acids possess a very high concentration that H+ ion (an acid having a pH of 3 has 0.001 moles per liter that Hydrogen ions).

Weak acid

A weak acid has a pH ranging in between 3-7.

Value that pKa

Strong acid

In a solid acid, the value of pKa is quite low.

Weak acid

In a weak acid, the worth of pKa is quite high.

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Strong acid

HCl(g) + H2O(l) ≈ H3O+(aq) + Cl−(aq)

Weak acid

CH3COOH(l) + H2O(l) ≈ H3O+(aq) + CH3COO−(aq)

Summary of solid acid Vs. Weak acid

The point out of difference between solid and Weak Acids have been summary below: comparison chart


Dr Amita Fotedar is an experienced research study Consultant through a demonstrated background of working in elite research Institutes like United Nations development Programme, Istanbul, Turkey, Indian academy of Science, Bangalore, India and International Water management Institute, Colombo, Srilanka. Skilled in organic Sciences, environmental Health, herbal Resources, Water source Management, and Renewable Energy, she has actually a doctor in environmental Sciences native the college of Jammu, India. Personally from she PhD, she has actually a post Graduate Diploma in international Studies from worldwide Pacific University, new Zealand Campus, and also has additionally been bonus a certification in Climate researches from Harvard college (EdX). She is a receiver of academic Excellence award from worldwide Pacific University, new Zealand campus. At existing she is pursuing MicroMasters in Sustainable power from The college of Queensland, Australia. She is a Co- founder and Research Advisor for a new Zealand based Sustainability and Environmental solutions Entity and is additionally a member the the environmental Peacebuilding combination at SDG Academy, providing mentorship (a collaborative network of academic and research establishments under the auspices of UN Secretary-General). She has around 35 national and also international publication to she credit.