Difference Between solid and Weak acid

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Acids are chemistry substances that donate hydrogen ions or proton when mixed in solutions. The variety of protons offered off through a specific acid in reality determines the toughness of the mountain – even if it is it is a solid acid or a weak acid. In stimulate to understand the stamin of the acids, one should compare their tendency to donate proton to the similar base (mostly water). The toughness is denoted through a number dubbed pKA.

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What is a solid acid?

An acid is said to be strong if the dissociates or ionizes fully in a solution. That means, that is able to give the largest variety of H+ ion or protons when mixed in a solution. These ions are the fee particles. Due to the fact that a strong acid donates a greater variety of ions together it division down, or ionizes, that means 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 mountain is associated to begin with.

In a general scenario,

Such chemistry reactions can be revered, however in couple of cases, the mountain is gives away H+ ion quite easily and the reaction looks choose being one-way. And the acid is complete dissociated.

For e.g., as soon as hydrogen chloride dissolves in H2O to make HCl, so small of the reverse reaction happens the we deserve to write:

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


What is a Weak acid?

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

Ethanoic mountain is a an excellent example of a weak acid. It mirrors reaction v H2O for creating H3O+ (Hydroxonium ions) and also CH3COOH (ethanoate ions), yet the turning back reaction shows an ext success than the forward one. The molecules reaction quite conveniently to ameliorate the acid and also the H2O.

At any one time, only around one percent that the CH3COOH mountain molecules display conversion into ions. Everything is left is the simple acetic mountain (systematically dubbed ethanoic acid) molecules.

Difference between strong acid and Weak acid


Strong acid

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

Weak acid

A weak mountain is one the ionizes partly in a solution. It provides off only couple of of the hydrogen atoms in come the solution. Thus it is less capable than a strong acid.

Electrical conductivity

Strong acid

Strong acids will always show strong conductivity. Solid acids commonly pass more current as contrasted to the weak acids because that the very same voltage and concentration.

Weak acid

Weak acids have actually a short conductivity. Castle are bad conductors and show a low value for existing passing

Rate of reaction

Strong acid

Rate that reaction is faster in the strong acids

Weak acid

Rate that reaction is slower in weak acids


Strong acid

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

Weak acid

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


Strong acid

In a strong acid, the pH is lower than, generally 3. Strong acids possess a very high concentration of H+ ion (an acid having a pH of 3 has 0.001 moles every liter that Hydrogen ions).

Weak acid

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

Value the pKa

Strong acid

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

Weak acid

In a weak acid, the worth of pKa is rather 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 strong acid Vs. Weak acid

The clues of difference between strong and Weak Acids have actually been summarized below: to compare chart


Dr Amita Fotedar is one experienced research Consultant through a demonstrated background of working in elite research Institutes favor United Nations advancement Programme, Istanbul, Turkey, Indian academy of Science, Bangalore, India and also International Water management Institute, Colombo, Srilanka. Skilled in organic Sciences, environmental Health, herbal Resources, Water source Management, and Renewable Energy, she has actually a phd in ecological Sciences from the college of Jammu, India. Personal from she PhD, she has actually a post Graduate Diploma in worldwide Studies from global Pacific University, brand-new Zealand Campus, and has additionally been bonus a certification in Climate research studies from Harvard university (EdX). She is a receiver of academic Excellence award from international Pacific University, brand-new Zealand campus. At present she is follow MicroMasters in Sustainable energy from The university of Queensland, Australia. She is a Co- founder and Research Advisor for a brand-new Zealand based Sustainability and also Environmental services Entity and is additionally a member that the eco-friendly Peacebuilding combination at SDG Academy, giving mentorship (a cooperation network of academic and research institutions under the auspices of UN Secretary-General). She has approximately 35 national and also international publications to she credit.