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Chemistry
Acids and Alkalis
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Created by
Burak
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Cards (29)
What is an indicator?
A dye that changes
color
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How does the dye in an indicator function?
It changes color based on
pH levels
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What does an indicator show when testing a solution?
The
pH
of the solution
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What are the types of indicators mentioned?
Universal indicator
Litmus paper
Phenolphthalein
Methyl orange
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What does a universal indicator do?
It combines
dyes
to show various colors
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How do you find the pH of an aqueous solution using an indicator?
Add
the
indicator
to the solution
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What color does litmus paper turn in acidic solutions?
Red
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What color does litmus paper turn in alkaline solutions?
Blue
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What color does phenolphthalein turn in acidic solutions?
Colorless
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What color does phenolphthalein turn in alkaline solutions?
Pink
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What color does methyl orange turn in acidic solutions?
Red
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What color does methyl orange turn in neutral solutions?
Yellow
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What color does methyl orange turn in alkaline solutions?
Yellow
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What pH do acids have?
Less than
7
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What pH do bases have?
Greater than
7
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What is the reaction between an acid and a base called?
Neutralization reaction
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What happens during neutralization?
An
acid
donates
protons
to a
base
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What is produced in a neutralization reaction?
Water
and a
salt
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What is the pH of neutral solutions?
7
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What do acids and bases produce when they react?
Neutral solutions
with
pH
of
7
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How can you represent neutralization in terms of ions?
H<sup>+</sup>
+
OH<sup>-</sup>
→
H₂O
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What are acid-base reactions sometimes called?
Acid-base
reactions
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What do acid-base reactions involve?
Proton transfer
between acid and base
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What happens to the pH when an acid neutralizes a base?
The pH becomes neutral at
7
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What is the role of acids in neutralization?
They donate
protons
to
bases
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What is the role of bases in neutralization?
They accept
protons
from acids
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What is the result of an acid donating protons?
It forms a
neutral solution
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What is the pH of a neutral solution?
7
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What happens to the products of neutralization?
They have a
pH
of
7
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