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A-level Chemistry (OCRa) PSC > Chapter 4 > Flashcards

Chapter 4 Flashcards

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1
Q

Define Acid

A

A proton (H+ ion) donor

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2
Q

Define a strong acid and give an example

A

Is an acid that completely dissociates in aqueous solution. (HCl)

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3
Q

Define weak acid

A

Is an acid that partially dissociates in aqueous solution (CH3COOH)

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4
Q

Hydrochloric acid

A

HCl

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5
Q

Sulfuric acid

A

(H2)SO4

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6
Q

Nitric Acid

A

(H)NO3

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7
Q

Ethanoic acid

A

CH3COO(H)

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8
Q

What is a base

A

Neutralises an acid to form a salt

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9
Q

What is a Alkali

A

A base that dissolves in water, releasing OH-ions

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10
Q

What is a neutralisation reaction?

A

Bases react with acids to form a salt

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11
Q

Formula for Sodium hydroxide

A

NaOH

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12
Q

Formula for potassium hydroxide

A

KOH

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13
Q

Formula for Ammonium hydroxide

A

NH4OH

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14
Q

What is a titration

A

A technique used to accurately measure the volume of one solution that reacts exactly with another solution

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15
Q

Name the equipment used in a titration

A

Burette, conical flask, white tile. Bulb, pipette filler, volumetric flask. Dropping pipette

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16
Q

Oxidation number sign placement

A

Before the number

17
Q

In which compound is H not +1

A

Metal hydrides (NaH = -1)

18
Q

Where is O not -2

A

In Peroxides (H2O2 = -1) and OF2 = +2

19
Q

Where is Cl not -1

A

When combined with O or F

20
Q

What is oxidation and what happens with the oxidation number

A

Oxidation is the loss of electrons, so the oxidation number rises

21
Q

What is Reduction and what happens with the oxidation number

A

Reduction is the gain of electrons, the oxidation number decreases

22
Q

What needs to happen for a reaction to be a redox reaction

A

Both reduction and oxidation must occur in the same reaction

23
Q

Oxidation number and formula of hydroxide

A

OH = -1

24
Q

Oxidation number and formula of Carbonate

A

CO3 = -2

25
Q

Oxidation number and formula of nitrate

A

NO3 = -1

26
Q

Oxidation number and formula of sulfate

A

SO4 = -2

27
Q

Oxidation number and formula of oxide

A

O = -2

28
Q

Oxidation number and formula of ethanoate

A

CH3COO = -1

29
Q

Oxidation number and formula of chloride

A

Cl = -1

A-level Chemistry (OCRa) PSC (6 decks)

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