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15
×
Acids turn litmus paper _____.
red
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15
×
What is an OH- ion called?
a hydroxide ion
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15
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Metals form oxides that are solids. If they dissolve in water, these oxides give _______ solutions.
alkaline
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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
×
What kind of acid is in the atmosphere of Venus?
sulphuric acid (due to volcanic activity)
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boom
Lose 50 points!
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gold
Win 50 points!
Okay!
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shark
Other team loses 15 points!
Okay!
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thief
Give points!
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25
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eraser
Reset score!
Oops!
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gift
Win 15 points!
Okay!
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shark
Other team loses 10 points!
Okay!
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banana
Go to last place!
Oops!
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monster
Reset all scores!
Oops!
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gold
Win 50 points!
Okay!
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gift
Win 25 points!
Okay!
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banana
Go to last place!
Oops!
15
×
Universal Indicator is green in the presence of a substance. What does this indicate?
The substance is neutral.
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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
×
Alkalis have a pH _________ than __.
greater than 7
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15
×
Which acid is present in orange juice?
citric acid
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25
×
What does "pH" actually stand for, anyway?!?!
The German "potenz H(ydrogen)", which means the power of the hydrogen-ion concentration.
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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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thief
Give points!
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25
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seesaw
Swap points!
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fairy
Take points!
5
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15
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25
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banana
Go to last place!
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15
×
What adjective is the opposite of "dilute"?
concentrated
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