Strong & Weak Acids (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Flashcards
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What do acids release in water?
What do acids release in water?
Hydrogen ions () and anions
What determines if an acid is strong or weak?
What determines if an acid is strong or weak?
Extent of dissociation
What is dissociation of acids?
What is dissociation of acids?
Acid molecules split into ions and anions
Define strong acids
Define strong acids
Acids that completely dissociate in water
Effect of strong acids on pH
Effect of strong acids on pH
High conc. leads to low pH
Examples of strong acids
Examples of strong acids
, ,
Define weak acids
Define weak acids
Acids that partially dissociate in water
Nature of weak acid dissociation
Nature of weak acid dissociation
Reversible with equilibrium
Where does equilibrium lie for weak acids?
Where does equilibrium lie for weak acids?
Far to the left
Weak acids and pH
Weak acids and pH
Lower conc., thus higher pH than strong acids
Example of weak acid
Example of weak acid
Ethanoic acid ()
Effect of increasing conc. on pH
Effect of increasing conc. on pH
pH decreases
pH change for tenfold increase
pH change for tenfold increase
pH decreases by 1 unit
Difference: acid strength vs concentration
Difference: acid strength vs concentration
Strength = dissociation; conc. = amount dissolved
What does acid strength refer to?
What does acid strength refer to?
Ability to dissociate in water