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Strong and Weak Acids
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Created by
Lily Ford
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Cards (22)
What is the main focus of the video?
The difference between
strong
and
weak
acids
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What pH value indicates an acid?
Less than
seven
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Why do acids have a pH of less than seven?
They ionize to release
hydrogen ions
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What ions does hydrochloric acid dissociate into?
H<sup>+</sup>
and
Cl<sup>-</sup>
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What defines strong acids like hydrochloric and nitric acid?
They
ionize
completely in solution
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What does a hydrogen ion represent?
A
hydrogen atom
that lost one electron
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Name two examples of weak acids.
Ethanoic acid
and
citric acid
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How do weak acids ionize in solution?
Only a small portion
dissociates
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What does the double arrow in the dissociation equation indicate?
The reaction is
reversible
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What does it mean when the equilibrium lies to the left for weak acids?
More
undissociated
acid
than
dissociated
acid
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How is acid strength different from concentration?
Strength is about
ionization
proportion
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What does concentration measure in a solution?
Amount of
acid
in a certain volume
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Can strong acids be found in low concentrations?
Yes
, they can be both
high
and
low
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What does pH measure?
The concentration of
hydrogen ions
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How does pH change with hydrogen ion concentration?
Higher
concentration results in
lower
pH
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What does a decrease of one on the pH scale represent?
Hydrogen ion concentration increases by a
factor of 10
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If pH changes from 5 to 3, how much does the hydrogen ion concentration increase?
By a
factor of 100
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If pH changes from 8 to 11, how does the hydrogen ion concentration change?
Decreases by a
factor of 1,000
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What is required for a strong acid to achieve a low pH?
A high concentration of
hydrogen ions
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Why does a weak acid need to be concentrated to achieve a low pH?
Few particles ionize to release
hydrogen ions
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What determines the pH of a solution?
The concentration of
hydrogen ions
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How does the pH of a strong acid compare to a weak acid at the same concentration?
The strong acid has a
lower
pH
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