The Brønsted-Lowry Theory (Leaving Cert Chemistry): Quizzes

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The Brønsted-Lowry Theory
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In which year did Brønsted and Lowry independently propose their acid-base theory?

1923

According to Brønsted-Lowry theory, what does an acid do?

Donates a proton

According to Brønsted-Lowry theory, what does a base do?

Accepts a proton

In the reaction HCl+H2O→H3O++Cl−\text{HCl} + \text{H}_2\text{O} \rightarrow \text{H}_3\text{O}^+ + \text{Cl}^-, what role does HCl\text{HCl} play?

Acid (proton donor)

In the reaction NH3+H2O→NH4++OH−\text{NH}_3 + \text{H}_2\text{O} \rightarrow \text{NH}_4^+ + \text{OH}^-, what role does NH3\text{NH}_3 play?

Base (proton acceptor)

What is the hydronium ion?

H3O+\text{H}_3\text{O}^+

What characterises a strong acid in Brønsted-Lowry theory?

Excellent proton donor

What does amphoteric mean?

Can act as acid or base

When water reacts with NH3\text{NH}_3, what role does water play?

Acid

What is a key advantage of Brønsted-Lowry theory over earlier definitions?

Works in non-aqueous solutions

What does the Greek prefix 'amphi' mean in amphiprotic?

Both sides

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