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5
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You can use an i_______r to detect whether a solution is acidic or alkaline.
indicator
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thief
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star
Double points!
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rocket
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thief
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5
×
What pH value do acids have? (less than 7, greater than 7)
Acids have a pH less than 7.
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Weak alkalis have a (lower, greater) concentration of hydroxide ions compared to strong alkalis.
lower
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5
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Neutralization is a chemical reaction between an acid and a base that produces w____ and a s___.
water and salt
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Weak acids ________ (partially, completely) ionize in water.
partially
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5
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The more acidic a solution, the (lower,greater) the pH.
lower
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monster
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seesaw
Swap points!
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fairy
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thief
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In pure water, the concentration of hydrogen ions and hydroxide ions are _____ (equal, not equal).
equal
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Alkalis have a pH (lower, greater) than 7.
greater
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Neutral substances, such as pure water, have a pH of ____.
7
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5
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What color is litmus in a neutral solution? P_____
Purple
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Give at least one example of strong alkalis.
Sodium Hydroxide (NaOH) and Potassium Hydroxide (KOH)
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Hydrogen is common to all _____. ( acids, base)
acids
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thief
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25
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fairy
Take points!
5
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20
25
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rocket
Go to first place!
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thief
Give points!
5
10
15
20
25
5
×
Ammonia. (weak alkali or strong alkali)
weak alkali
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