Strong and Weak Acids | GCSE Chemistry Practice
Acids are defined by their ability to release hydrogen ions ($H^+$) in solution.
Does a weak acid have a higher or lower pH than a strong acid of the same concentration?
What is Strong and Weak Acids | Practice?
"Strong acids are fully ionised in aqueous solution; weak acids are only partially ionised."
Which of these metals is the MOST reactive?
Zinc is extracted from its ore by heating with carbon. This is because...
Which of these metals will NOT react with dilute acid?
In electrolysis, where do the positive ions (cations) move to?
Ionisation Levels
Strong acids (e.g. HCl) fully ionise in water.
Weak acids (e.g. ethanoic acid) only partially ionise.
As pH decreases by 1 unit, the $H^+$ concentration increases by a factor of 10.
Concentration is NOT the same as strength.
Exam Link: A "dilute strong acid" can have a higher pH than a "concentrated weak acid". Don't mix up strength and concentration!
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