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Is CO2 and acid or a base?

Updated: 8/10/2023
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13y ago

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The definition of an acid is commonly known as a substance which can produce hydrogen ions (Hydronium ions to be more precise) in solution. However, the currently more 'correct definition' of an acid is the Bronsted-Lowry definition which states that an acid is a substance which donates protons (i.e. hydrogen ions).

Carbonic acid, as the name implies, is an acid which can ionise in aqueous solution to form bi-carbonate ions and hydrogen ions. In other words, carbonic acid ionises in solution to give up a proton (hydrogen ion) and produce bi-carbonate ions.

H2C03 <-> H+ + HCO3-

However, bicarbonate ions can act as a base or an acid according to Bronsted-Lowry definition as bi-carbonate ions can accept or donate protons (hydrogen ions). We call these substances which can accept or donate protons: Amphiprotic substances. Thus, bicarbonate ion is an amphiprotic substance because it can act a either a base or an acid.

Bi-carbonate ions acting as an acid:

HCO3- <-> H+ + CO32-

Bi-carbonate ions acting as an base:

HCO3- + H+ <-> H2CO3

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14y ago
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13y ago

it is acid. dissolved into water it forms a weak acid called carbonic acid.

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11y ago

It is base . According to lewis concept of acids and bases a substance that contain lone pair is base and oxygen contain lone pair in carbondioxide

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9y ago

CO2 (carbon dioxide) is an acid gas. It is able to dissolve in water and form carbonic acid which makes it a major source of ocean acidification.

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13y ago

The most common source of acidity in water is dissolved carbon dioxide.

So CO2 in water is infact an acid not a base.

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13y ago

CO2 is mildly acidic.

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13y ago

Neither. It's neutral.

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12y ago

base

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Q: Is CO2 and acid or a base?
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Related questions

Is CO2 a base?

It's not a base,it's an acid. CO2 in the air is actually neither a base or an acid. However, when it comes into contact with water it reacts to become H2CO3, which is an acid.


C02 plus H20 is a base?

No, it forms an acid, H2O + CO2 --&gt; H2CO3 (carbonic acid)


Is bottled soda an acid or a base?

soda is acidic because it has CO2 and carbonate


Why is it necessary to rid distilled water of CO2?

because when co2 dissolves in water, it creates carbonic acid which is very acidic...when titrating an acid/base reaction, this requires more base since the "water" would now be acidic


Is CO2 a base acid or salt?

When CO2 is dissolved with water creates H2CO3 which is a acid


Is CO2 a acid?

No, CO2, or carbon dioxide, is not an acid.


What is the reason for baking soda to be a base?

Baking soda reacts with acid, so it's a base: HCO3- + H+ --&gt; H2O + CO2


Sulphuric acid magnesium carbonate?

The chemical reaction is: MgCO3 + H2SO4 ------------&gt; MgSO4 +CO2 + H2O


Does acid concentration change if it is left standing?

It can if left standing and the water evaporates, making it stronger. Bases are more likely to change however, due to CO2 in the air. When CO2 combines with water, it forms the acid H2CO3, which is carbonic acid, which tends to neutralize the base.


What acid is produced by bubbling co2 into water?

CO2 + H2O --> H2CO3Carbonic acid.=========


The acid form of CO2 plus H2O?

The "acid" form of CO2 and H2O is H2CO3, carbonic acid.


Why carbonic acid gives acid salt but hydrochloric acid does not?

Hydrochloric acid (HCl) is a strong acid, and when reacted with a strong base will give a neutral salt. When reacted with a weak base it will give an acid salt. Example, HCl + NH3 => NH4Cl.Carbonic acid (H2CO3) is a weak acid and is actually CO2 + H2O. When reacted with a strong base, it will give an alkaline salt and when reacted with a weak base will give a solution the pH of which will depend on the Kb and Ka of the reactants.