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12 Chemistry > Acid-Base Chemistry > Flashcards

Acid-Base Chemistry Flashcards

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1
Q

Base + Ammonium Salt–>??

A

Base + Ammonium Salt–> Salt + Water + Ammonia (gas)

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2
Q

Factors that effect buffering capacity

A
  • The relative concentrations of the weak X and its conjugate Y-highest buffering when equal
  • The actual concentration of the weak X and its conjugate Y- buffering capacity increase with increasing concentration
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3
Q

Acid + Sulphide–>??

A

Acid + Sulphide–> Salt + Hydrogen Sulphide (gas)

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4
Q

HCO3(-)

A

Basic

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5
Q

What is an base

A

A base is a substance that accepts one or more protons

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6
Q

Colour change of methyl orange

A

red: ph<3.1
yellow: ph>4.4

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7
Q

The Strong Acids

A
  • Hydrochloric acid (HCL)
  • Sulfuric acid (H2SO4)
  • Nitric acid (HNO3)
  • Hydrobromic acid (HBr)
  • Hydroiodic acid (HI)
  • Perchloric acid (HClO4)
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8
Q

H2PO4(-)?

A

Acid

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9
Q

HPO4(2-)

A

Basic

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10
Q

Acid + Sulphite–>??

A

Acid + Sulphite–> Salt + Water + Sulphur Dioxide(gas)

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11
Q

SO4(2-)

A

Basic

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12
Q

Requirements for Primary standard

A
  • Able to be obtained in a very pure form
  • Needs to be sufficiently stable
  • Has a relatively high molar mass
  • High water solubility
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13
Q

CO3(2-)

A

Basic

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14
Q

Colour change of phenolphthalein

A

colourless: ph<8.3
pink: ph>10

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15
Q

HSO4(-)

A

Acid

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16
Q

What is the equivalence point?

A

The equivalence point is when the two reactants are in perfect stoichiometric values

17
Q

Why is water special?

A

Water is an amphiprotic substance meaning it acts as both an acid and a base

18
Q

Properties of an Indicator

A
  • weak acid or weak base

* changes colour at different pH

19
Q

Define Buffer

A
  • Solutions that have the ability to resist pH change when either acids or bases are added to them
  • They generally contain a weak acid and its conjugate base or its weak base and its conjugate acid
20
Q

What is an acid

A

An acid is a substance that donates one ore more protons or hydrogen ions

21
Q

Buffering capacity

A

A measure of the amount of acid/base the buffer can neutralise before the pH begins to change appreciably

22
Q

What indicator to use if acidic/basic salt?

A
  • Methyl Orange: Acidic salt

* Phenolphthalein: Basic salt

23
Q

What is the end point?

A

The end point is when the indicator changes colour

24
Q

What is special about group 13 and transition metals?

A

They act as acids, forming H30(+) in water

25
Q

PO4(3-)

A

Basic

26
Q

Define electrolytes

A

Electrolytes are substances that dissolve in water and form ions

12 Chemistry (7 decks)

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