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8.5 Strong and weak acids and bases Questions and Answers
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8.5 Strong and weak acids and bases Questions and Answers Strong acids Strong acids dissociate completely in aqueous solution. Examples: HCl, H2SO4 (first dissociation only), HNO3. This can be represented as: HA → H(+) + A(-) The non-reversible arrow (→) is used to indicate that dissociat...

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  • September 30, 2024
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  • 2024/2025
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  • 85 strong and weak acids and bases questions and
  • strong acids strong acids dissociate completely in
  • weak acids weak acids dissociate only partially in

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8.5 Strong and weak acids and bases
Questions and Answers
Strong acids - answer Strong acids dissociate completely in aqueous solution.
Examples: HCl, H2SO4 (first dissociation only), HNO3.
This can be represented as:
HA → H(+) + A(-)
The non-reversible arrow (→) is used to indicate that dissociation is essentially
complete.

Weak acids - answer Weak acids dissociate only partially in aqueous solution.
Examples: H2CO3, CH3COOH.
The dissociation of a weak acid is represented by:
HA ⇌ H(+) + A(-)
The equilibrium arrow indicates that the reaction is reversible and does not go to
completion.

Monoprotic acid - answer HCl is a monoprotic acid as it dissociates to form one
proton per molecule.

Diprotic acid - answer H2SO4 is a diprotic acid as it can dissociate to generate two
protons per molecule.

Strong bases - answer Strong bases ionize completely in aqueous solution.
Examples: NaOH, group 1 hydroxides, Ba(OH)2
NaOH → Na(+) + OH(-)

Weak bases - answer Weak bases ionize only partially in aqueous solution.
Example: Ammonia
NH3 + H2O ⇌ NH4(+) + OH(-)

The relationship between the strength of an acid and the strength of its conjugate base -
answer The stronger an acid, the weaker its conjugate base.
A strong acid is a good proton donor that ionizes completely in aqueous solution - it has
a weak conjugate base.

The relationship between the strength of a base and the strength of its conjugate acid -
answer The stronger the base, the weaker its conjugate acid.
A strong base is a good proton acceptor that ionizes completely in aqueous solution - it
has a weak conjugate acid.

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