Strong & Weak Acids (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards

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Strong & Weak Acids
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Ions released by acids in water

Hydrogen ions (\ceH+\ce{H+}) and anions

What determines acid strength

Extent of dissociation

Strong acids definition

Completely dissociate in water

3 examples of strong acids

\ceHCl\ce{HCl}, \ceHNO3\ce{HNO3}, \ceH2SO4\ce{H2SO4}

pH of strong acids

Low pH (high \ceH+\ce{H+} concentration)

Weak acids definition

Partially dissociate in water

Equilibrium position for weak acids

Far to the left

Example of weak acid

Ethanoic acid (\ceCH3COOH\ce{CH3COOH})

pH of weak acids vs strong acids

Higher pH (lower \ceH+\ce{H+} concentration)

Effect on pH when \ceH+\ce{H+} increases

pH decreases

pH change for 10-fold increase in \ceH+\ce{H+}

Decreases by 1 unit

Acid strength vs concentration

Strength=dissociation; conc.=amount dissolved

\ceH+\ce{H+} factor change: pH 1 to 3

Decreases by factor of 100

Explore OCR GCSE Chemistry A (Gateway Science Suite) Revision Notes by Topics

Reactivity of Metals

Reactions of Acids

Electrolysis

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Reactivity of Metals

Reactions of Acids

Electrolysis

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Reactivity of Metals

Reactions of Acids

Electrolysis

Explore OCR GCSE Chemistry A (Gateway Science Suite) Exam Questions by Topics

Reactivity of Metals

Reactions of Acids

Electrolysis

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