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When a protic acid is added to water, it releases a hydrogen ion (H+) (also called a proton because a hydrogen atom missing one electron is nothing but a proton!). However, H+ will not stay a free ion, and instead immediately combines with a nearby water molecule (H2O) to form the hydronium ion, H3O+. For example, when hydrochloric acid (HCl) is added to water, the following reaction occurs: HCl + H2O --> H+ + Cl- + H2O --> H3O+ + Cl- Note that the Cl- is stable by itself and does not combine with anything else. This is because it is much larger than H+ (remember, H+ is just a single proton), and that makes Cl- more stable (they both have a single charge, but because Cl- is larger, the charge density is lower and it is the charge density that matters -- the sign, + or -, makes no difference).

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16y ago
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11y ago

When a protic acid is added to water, it releases a hydrogen ion (H+) (also called aproton because a hydrogen atom missing one electron is nothing but a proton!). However, H+ will not stay a free ion, and instead immediately combines with a nearby water molecule (H2O) to form the hydronium ion, H3O+.

For example, when hydrochloric acid (HCl) is added to water, the following reaction occurs:

HCl + H2O --> H+ + Cl- + H2O --> H3O+ + Cl-

Note that the Cl- is stable by itself and does not combine with anything else. This is because it is much larger than H+ (remember, H+ is just a single proton), and that makes Cl- more stable (they both have a single charge, but because Cl- is larger, the charge density is lower and it is the charge density that matters -- the sign, + or -, makes no difference).

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14y ago

when a water molecule gains an hydrogen ion from another water molecule

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13y ago

from what I see it is just an acid, not 100% sure on this one

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14y ago

In short, hydronium ions are created when and extra hydrogen atom bonds with water.

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12y ago

The acid gives up a proton (H+) to a water molecule to form a hydronium ion.

Here's an example with hydrochloric acid:

HCl + H2O --> H3O+ + Cl-

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14y ago

Hydronium Ion = H3O+

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Q: How does the hydronium ion form. what is its formula?
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Related questions

The formula for hydronium ions is?

The chemical formula of hydronium is H3O +.


What is the formula of hydronium ion and oxide ion?

The chemical formula of hydronium ion is (H3O)+.For the "oxide ion" check your spelling.


What is the formula for the hydromium ion?

The formula for Hydronium Ion is H30+. Hydronium Ion is an Aqueous Solution and is also considered as a bare nucleus.


What is the equation illustrating how hydrogen ions become hydronium ions in water?

Formula of a hydrogen ion is H+, its formula is equal to that of a proton. Also hydrogen may form a hydride anion, H-


What is the formula for hydronium ion?

H3o+.


What is the formula and charge for Hydronium ion and oxide?

The formula forHydronium ion isH3O+, it has a charge of +1. The formula for Hydroxide ion isOH-, and it has a charge of -1.


Describe the molecular geometry of the hydronium ion H3O?

The ion hydronium has a pyramidal form, H atoms forming the base.


What represents hydronium ions?

H3O +====Molecular formula of an hydronium ion and what is actually seen in solution proton donation.


What ion forms when water dissociates?

Water disassociates to form the OH- ion or the hydroxide ion, and the H3O+ ion, otherwise known as the hydronium ion.


How does hydronium ion form?

when a water molecule gains an hydrogen ion from another water molecule


What is the name and formula for the ion formed when an acid is in aqueous solution?

When an acid is placed in water, the hydronium ion (H3O^+) is formed.


Why do hydronium ions form in aqueous acid solutions?

Hydronium ion (H3O+) form in aqueous solution because the water molecule, H2O can accept a proton which is donated from an acid. Thus, the proton (H+) reacts with H2O to produce H3O+, the hydronium ion.