The Arrhenius Theory (Leaving Cert Chemistry): Quizzes

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The Arrhenius Theory
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In which year did Svante Arrhenius submit his PhD thesis on acids and bases?

1884

According to Arrhenius, what defines an acid?

Dissociates in H2O\text{H}_2\text{O} to produce H+\text{H}^+

According to Arrhenius, what defines a base?

Produces OH−\text{OH}^- ions in water

What type of acid is H2SO4\text{H}_2\text{SO}_4 based on H+\text{H}^+ ions produced?

Dibasic

How many H+\text{H}^+ ions does a tribasic acid produce?

3

What characterises a strong acid?

Almost complete dissociation in H2O\text{H}_2\text{O}

Which of these is an example of a weak acid?

Ethanoic acid

Which base is classified as a strong base?

NaOH

What do H+\text{H}^+ ions actually form in aqueous solution?

Hydronium ions (H3O+\text{H}_3\text{O}^+)

What is a major limitation of the Arrhenius theory?

Only applies to aqueous solutions

Why can't Arrhenius theory explain NH3+HCl→NH4Cl\text{NH}_3 + \text{HCl} \rightarrow \text{NH}_4\text{Cl}?

No water involved

What grade did Arrhenius receive for his PhD thesis?

Lowest possible passing grade

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