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15
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A substance contains an excess of H+ ions. What is its pH?
It is acidic, so it is lower than 7.
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15
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What adjective means "can eat through material"
corrosive
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15
×
Which acid is present in orange juice?
citric acid
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eraser
Reset score!
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rocket
Go to first place!
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gift
Win 20 points!
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lifesaver
Give 25 points!
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eraser
Reset score!
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shark
Other team loses 15 points!
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fairy
Take points!
5
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25
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banana
Go to last place!
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15
×
Acids turn litmus paper _____.
red
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15
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Acids have a pH of _____ than __.
less than 7
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15
×
What is the most accurate method to measure pH?
Use a pH meter which uses an electrode to measure pH electrically.
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15
×
What is an OH- ion called?
a hydroxide ion
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15
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What kind of acid is in the atmosphere of Venus?
sulphuric acid (due to volcanic activity)
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15
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What acid is present in vinegar?
acetic acid (ethanoic acid)
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heart
Other team wins 20 points!
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gold
Win 50 points!
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gift
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thief
Give points!
5
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15
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25
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seesaw
Swap points!
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seesaw
Swap points!
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gift
Win 15 points!
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banana
Go to last place!
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15
×
How can we use litmus paper to test the pH of gases?
The litmus paper must be damp.
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15
×
A substance contains an excess of OH- ions. What is its pH?
It is alkaline, so it is higher than 7.
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15
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Universal Indicator is green in the presence of a substance. What does this indicate?
The substance is neutral.
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