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Chemistry Units 1 and 2 > Acids and bases > Flashcards

Acids and bases Flashcards

1
Q

Brontsted-lowry

A

Acids are proton donors and bases are a proton acceptor

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2
Q

Polyprotic

A

Acid can donate more than one proton to a base

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3
Q

Amphiprotic

A

Describes a substance which can behave as either a proton donor or a proton acceptor

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4
Q

What is the strength of an acid determined by

A

how readily it can donate a proton

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5
Q

Property of strong acids

A

Strong acids ionise completely in water

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6
Q

Property of weak acids

A

Weak acids partially ionize in water

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7
Q

Property of strong bases

A

Accept protons very readily

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8
Q

Property of weak bases

A

Only a small proportion accept a proton from an acid

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9
Q

What is the relationship between the strength of an acid and its conjugated base

A

The stronger an acid, the weaker its conjugated base

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10
Q

Property of concentrated acid/bases in relation to dilute acid/bases

A

Concentrated acids/bases contains more moles of solute per litre of solution than a dilute acid or base

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11
Q

Strong acids

A

H2SO4
HCL
HNO3

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12
Q

Weak acids

A

Ch3cooh
H2Co3
H3po4
HF

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13
Q

Strong bases

A

NaOH
KOH
Ca(OH)2

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14
Q

Weak Bases

A

NH3

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15
Q

acid + metal hydroxide

A

Salt + water

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16
Q

Acid + metal carbonate

A

Salt + water + Carbon dioxide

17
Q

Acid + metal hydrogen carbonate

A

Salt + water + Carbon dioxide

18
Q

Property of antacids that assists in the neutralisation of stomach acids

A

Antacids contain weak, non toxic bases such as
Magnesium carbonate, Calcium carbonate, Aluminium hydroxide, Magnesium Hydroxide
that undergoes a mild neutralisation reaction with stomach acid

19
Q

Precision

A

How close multiple measurements of the same investigation are to each other

20
Q

Accuracy

A

How close an experiment value is to a known value

21
Q

What are indicators

A

Weak acids or weak bases that only partially ionise in solution

22
Q

Advantage of using pH Meter over indicators

A

Results are not affected by colour or cloudiness

Values are accurate to 0.01

Some pH meters have an inbuilt calibration for temperature changes.

23
Q

Examples of Natural indicators

A

Litmus
Red Cabbage

24
Q

Examples of commercial indicators

A

Methyl orange
phenolphthalein
Bromothymol Blue

Chemistry Units 1 and 2 (6 decks)

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