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Chem Staff 2023 Editing > Acids and Bases Deck 1 > Flashcards

Acids and Bases Deck 1 Flashcards

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1
Q

Define an acid

A

Proton Donor

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2
Q

Define a base

A

Proton Acceptor

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3
Q

Define a strong Acid

A

An acid (proton donor) which fully dissociates

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4
Q

Define a weak Acid

A

An acid ( proton donor) which only partially dissociates

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5
Q

Define pH

A

pH = -Log10[H+]

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6
Q

[H+] =

A

[H+] = 10-pH

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7
Q

Ionic Product of Water (Kw) =

A

Kw = [H+][OH-]

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8
Q

When calculating the pH of a strong acid use:

A

pH = -Log10[H+]

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9
Q

When calculating the pH of a strong base use:

A

Rearrange Kw = [H+][OH-] to get [OH-] then use pH = -Log10[H+]

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10
Q

When calculating the pH of a weak acid use:

A

Ka = [H+]2/[HA] and rearrange to get [H+]
then use pH = -Log10[H+]

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11
Q

Chemical equation for Hydrochloric Acid + Sodium

A

HCl(aq) + Na(s) –> NaCl(aq) + ½ H2(g)

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12
Q

Chemical equation for Nitric Acid + Potassium Oxide

A

2HNO3 (aq) + K2O(s) –> 2KNO3 (aq) + H2O(l)

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13
Q

Chemical equation for Phosphoric Acid + Sodium Hydroxide

A

H3PO4(aq) + 3NaOH(s) –> Na3PO4(aq (aq) + 3H2O(l)

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14
Q

Chemical equation for Hydrochloric Acid + Calcium Oxide

A

2HCl (aq) + CuO(s) –> CuCl2 (aq) + H2O(l)

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15
Q

Chemical equation for Sulfuric Acid + Sodium Carbonate

A

H2SO4(aq) + Na2CO3(s) –> Na2SO4(aq) + CO2(g) + H2O(l)

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16
Q

A difference of 1 on the pH scale means

A

a 10x difference in [H+]

17
Q

pKa =

A

-Log10Ka

18
Q

Ka =

A

10-pKa

19
Q

The value of Kw will alter with temperature, explain why pure water is always neutral

A

because [H+] = [-OH] at all times.

20
Q

Formula for sulphuric acid

A

H2SO4

21
Q

Formula for nitric acid

A

HNO3

22
Q

Formula for phosphoric acid

A

H3PO4

23
Q

Formula for ethanoic acid

A

CH3COOH

24
Q

Formula for aluminium phosphate

A

AlPO4

25
Q

Formula for sodium ethanoate

A

CH3COONa

26
Q

Formula for lead (II) nitrate

A

Pb(NO3)2

27
Q

Formula for potassium sulphate

A

K2SO4

28
Q

Formula for magnesium chloride

A

MgCl2

29
Q

Explain how to chose a suitable indicator for a titration

A

A SUITABLE INDIATOR CHANGES COLOUR SOMEWHERE ON THE VERTICAL SECTION OF A pH TITRATION CURVE

30
Q

What does the vertical section of a titration curve show?

A

This indicates what the average titre would be which can be used in a calculation. The midpoint of this vertical section is the equivalence point.

Chem Staff 2023 Editing (26 decks)

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