Theories of acids & bases questions

Assignment: Questions on Topic 8.1 : Theories of acids and bases

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Using the reactions between water and ammonia and water and hydrogen chloride explain why water can be considered as both a Brønsted-Lowry acid and a Brønsted-Lowry base. In each case give the acid - conjugate base pairs.

5 lines
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The hydroxide ion, OH–, can show amphiprotic behaviour.
Deduce the acid – conjugate base pairs when it is acting i. as an acid and ii. as a base.

3 lines
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State the conjugate acid formed from i. ammonia, NH3 and ii. the hydrogen sulfide ion, HS–.

2 lines
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State the conjugate base formed from i. hydrogen cyanide, HCN and ii. the hydrogen sulfide ion, HS–.

2 lines
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Identify the Brønsted-Lowry acids in the following reaction.

H2SO4(aq) + HNO3(aq) ⇄ HSO4−(aq)+ H2NO3+(aq)

1 line
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Identify with an explanation which of the following is not a Brønsted-Lowry acid - conjugate base pair.

i.  CH3COOH / CH3COO–

ii.  H3O+ / OH–

iii.  H2SO4 / HSO4–

iv.  HSO4– / SO42–

3 lines
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