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Middle School: 6th, 7th and 8th Grade
Science
Chemistry - Acids And Bases
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Q.1
This helps to reduce the amount of acids found in foods.
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Ions
0%
pH
0%
Bases
0%
Hydrogen
Q.2
An example of a base would be ________.
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potassium nitrate
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sodium hydroxide
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sodium chloride
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calcium chloride
Q.3
The word “acid” means _____.
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burn
0%
litmus
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ion
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sour
Q.4
When testing for _____, the litmus paper will turn blue.
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bases
0%
acids
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ions
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hydrogen
Q.5
The testing to determine the degree of acidity is done by _______.
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removing electrons from hydrogen
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dissolving substances in water
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adding a positive ion to a substance
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a pH scale
Q.6
These are either an atom or a molecule that has acquired an electrical charge.
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Protons
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Ions
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Electrons
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Neutrons
Q.7
The concept that bases can make acids weaker is known as _________.
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alkalies
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donors
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neutralization
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litmus
Q.8
Egg whites have a pH level of ___.
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8
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7
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9
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Q.9
Rainwater has a pH level of __.
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1
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6
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11
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5
Q.10
When testing for acids, the litmus paper will turn ____.
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green
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red
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blue
0%
brown
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