chemical reactions - strong and weak acids Flashcards

1
Q

what happens to acid molecules in aqueous solutions

A

they ionise and release hydrogen ions from

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2
Q

what are strong acids?

A

fully ionise in aqueous solutions

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3
Q

example of strong acid formula?
what do the arrows mean?

A

HCL -> H+ + Cl-
HNO3 -> H+ + NO3-

arrow in one direction means fully ionised

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4
Q

what are weak acids? what type of arrow do weak acid formulas have?

A

partially ionise in aqueous solutions
<- reversible reaction
->

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5
Q

examples of weak acids?

A

carbonic, ethanoic, citric acid

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6
Q

what does the pH scale give us an idea of?

A

the concentration of hydrogen ions and hydroxide

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7
Q

Strong acids have a _______ pH than ______ acids for given ___________ because ________ acids fully _____ producing a ________ _____________ of _________ ions

A

lower, weak, concentration, strong, ionise, greater concentration, hydrogen

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8
Q

what does the concentration of acid tell us?

A

the amount of acid molecules in given volume

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9
Q

______ acid has _______ acid _________ than concentrated ______ even if the _________ of the ____ is the same

A

dilute, fewer, molecules, acid, strength, acid

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10
Q

what happens as the pH scale decreases by 1 unite?

A

concentration of hydrogen ions increase by 10 times

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11
Q

what is one order of magnitude?

A

ph 1 - ph 2
10x difference between ph

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12
Q

what is two orders of magnitude?

A

ph 1 - ph3
the difference between 2 ph

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