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Acids

An acid is a proton donor.
All acids release hydrogen ions H+ when dissolved in water.
A hydrogen ion is a proton.Examples of inorganic acids are hydrochloric acid (HCl), sulfuric acid (H2SO4) and nitric acid (HNO3).
Hydrogen chloride gas releases protons on dissolving in water to form hydrochloric acid.
HCl(g) + aq → H+ (aq) + Cl- (aq)

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Specification: OCR Chemistry A (H032), AS-level, 2.1.4 Acids. Topic: Acids and Redox.

Key terms in this lesson

Ion
A positively or negatively charged atom or group of atoms, formed by the loss or gain of electrons.

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