Difference Between solid and Weak acid

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Acids are chemistry substances that donate hydrogen ion or protons when blended in solutions. The variety of protons given off through a certain acid in reality determines the toughness of the mountain – even if it is it is a solid acid or a weak acid. In order to recognize the stamin of the acids, one should compare their propensity to donate proton to the similar base (mostly water). The strength is denoted by a number dubbed pKA.

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What is a solid acid?

An acid is said to be solid if that dissociates or ionizes fully in a solution. That means, it is able to offer the largest number of H+ ion or protons when combined in a solution. These ions space the fee particles. Because a solid acid donates a greater number of ions together it division down, or ionizes, that way a strong acid is a conductor the electricity.

When an acid mixes in H2O, a proton (H+ ion) is lugged to a H2O molecule to create a H3O+ (Hydroxonium ion) and also a – ion based upon which acid is associated to start with.

In a general scenario,

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

For e.g., as soon as hydrogen chloride dissolves in H2O to do HCl, so little of the turning back reaction happens the we deserve to write:

At one time, hundred percent virtual reaction will certainly take ar wherein hydrogen chloride will display reaction v H3O+ (Hydroxonium ion) and Cl– ions. Here, the strong acid is Hydrogen Chloride.


What is a Weak acid?

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

Ethanoic mountain is a good example the a weak acid. It shows reaction through H2O for producing H3O+ (Hydroxonium ions) and CH3COOH (ethanoate ions), yet the reverse reaction shows an ext success than the forward one. The molecules react quite quickly to ameliorate the acid and also the H2O.

At any one time, only around one percent the the CH3COOH mountain molecules present conversion right into ions. Whatever is left is the straightforward acetic acid (systematically dubbed ethanoic acid) molecules.

Difference between strong acid and also Weak acid


Strong acid

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

Weak acid

A weak mountain is one that ionizes partially in a solution. It gives off only couple of of its hydrogen atom in to the solution. For this reason it is less qualified than a solid acid.

Electrical conductivity

Strong acid

Strong mountain will always show strong conductivity. Solid acids normally pass more current as compared to the weak acids because that the very same voltage and also concentration.

Weak acid

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

Rate the reaction

Strong acid

Rate that reaction is quicker in the solid acids

Weak acid

Rate that reaction is slower in weak acids


Strong acid

Hydrochloric mountain (HCl), Nitric mountain (HNO3), Perchloric acid (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 mountain (HCOOH), Nitrous mountain (HNO2).


Strong acid

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

Weak acid

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

Value of pKa

Strong acid

In a strong acid, the worth 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 solid acid Vs. Weak acid

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


Dr Amita Fotedar is an experienced research Consultant with a demonstrated background of working in elite research study Institutes favor United Nations advance Programme, Istanbul, Turkey, Indian institute of Science, Bangalore, India and International Water management Institute, Colombo, Srilanka. Skilled in biological Sciences, environmental Health, natural Resources, Water resource Management, and Renewable Energy, she has a phd in ecological Sciences native the university of Jammu, India. Personally from she PhD, she has actually a post Graduate Diploma in worldwide Studies from worldwide Pacific University, brand-new Zealand Campus, and also has likewise been rewarded a certification in Climate research studies from Harvard college (EdX). She is a recipient 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 services Entity and is likewise a member the the environmental Peacebuilding combination at SDG Academy, offering mentorship (a cooperation network of scholastic and research establishments under the auspices of UN Secretary-General). She has approximately 35 national and international publication to she credit.