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Team 2
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Teams
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Score
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thief
Give points!
5
10
15
20
25
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fairy
Take points!
5
10
15
20
25
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fairy
Take points!
5
10
15
20
25
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lifesaver
Give 20 points!
Oops!
15
×
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
×
What adjective means "can eat through material"
corrosive
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lifesaver
Give 10 points!
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gift
Win 10 points!
Okay!
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shark
Other team loses 10 points!
Okay!
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lifesaver
Give 10 points!
Oops!
15
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How can we use litmus paper to test the pH of gases?
The litmus paper must be damp.
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15
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Acids turn litmus paper _____.
red
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baam
Lose 10 points!
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star
Double points!
Okay!
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gift
Win 25 points!
Okay!
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lifesaver
Give 10 points!
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15
×
Metals form oxides that are solids. If they dissolve in water, these oxides give _______ solutions.
alkaline
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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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15
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What adjective is the opposite of "dilute"?
concentrated
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15
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Name a pH indicator other than litmus or Universal Indicator.
methyl orange or phenolphthalein (also hydrangea flowers, turmeric, and anthocyanins)
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15
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What is an OH- ion called?
a hydroxide ion
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15
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Alkalis turn litmus paper ______.
blue
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15
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The more acidic the solution, the ______ the pH.
lower
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15
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Which acid is present in orange juice?
citric acid
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15
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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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