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Chemistry - A Level > O 2 > Flashcards

O 2 Flashcards

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1
Q

What does the bronsted Lowry theory state?

A

Acids are proton donors eg. NH4+
Bases are proton acceptors eg. OH-

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2
Q

When is a conjugate acid formed?

A

When a base accepts a proton

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3
Q

When is a conjugate base formed?

A

When an acid donate a proton

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4
Q
A

A - acids
B - conjugate base
C - base
D - conjugate acid

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5
Q

What is a strong acid?

A

An acid that completely dissociates into its ions when in solution

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6
Q

What is a strong base?

A

A base that completely dissociates into its ions when in solution

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7
Q

What is the pH of a strong acid?

A

Between 0 - 1

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8
Q

What is the pH of a strong acid?

A

Between 0 - 1

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9
Q

What is the pH of a weak acid?

A

3-7

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10
Q

What is the pH of a strong base?

A

12-14

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11
Q

What is the pH of a weak base?

A

7-11

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12
Q

What is the reacting ion (the ion in the ionic equation) in reactions of acids with carbonates, metal oxides and alkalis?

A

H+

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13
Q

What does the reaction of weak acids and bases have?

A

An acid dissociation constant (Ka)

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14
Q

What is the equation for Ka?

A
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15
Q

How can you find Ka?

A
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16
Q

What does a high Pa and low Kpa mean?

A

Strong acid

17
Q

What does pH give?

A

The concentration of H+ ions in a solution

18
Q

what does a pH of 0 mean?

A

Solution is acidic
High concentration of H+ ions

19
Q

Equations which link pH and [H+]

A
20
Q

What is [H+] equivalent to?

A

The concentration fo a strong acid

21
Q

How do you calculate the pH of a strong base?

A
22
Q

What is [OH-] in Kw = [OH-][H+]?

A

The same as the concentration of the base

23
Q

What is Kw?

A

10 to the minus 14

24
Q

When do you use Kw to find [H+], then pH?

A

When A- is in excess

25
Q

When do you use [HA] and [A-] along with Ka to find [H+], then pH?

A

When HA is in excess

26
Q

When is pKa equal to pH?

A

When HA = A-

27
Q

What is Kw equation and when is it used?

A

Kw = [OH-] [H+]
When calculating the pH of a strong base

Chemistry - A Level (21 decks)

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