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as chemistry > acids > Flashcards

acids Flashcards

1
Q

acid

A

proton donor

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2
Q

base

A

proton acceptor

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3
Q

acid or base

A

react with water is a reversible reaction

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4
Q

alkali as a base

A

base that’s soluble in water and produces oh- ions in water

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5
Q

weak acid

A

CH3COOH and other carboxylic acids
backwards reaction favoured so not many h+ produced
ch3cooh ⇌ ch3cooh + h+

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6
Q

strong acid

A

Hcl h2so4 hno3
forward reaction favoured lots of h+ ions produced

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7
Q

strong base

A

Naoh KOH
forward reaction favoured strongly so man hy oh- ions produced

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8
Q

weak base

A

nh3
backward reaction favoured so not many oh- ions produced

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9
Q

acid + base

A

acid + base → salt (ph neutral)
h= ions from acid reaction with oh- ions in base forming water = neutral

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10
Q

nh3

A

doesn’t produce oh- ions directly
reacts with water 1st
accepts protons to produce nh4+ and oh- Ions

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11
Q

ammonia + acid

A

salt and no water

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12
Q

acid + metal

A

salts

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13
Q

metal and acid

A

salt and hydrogen
ca(S) + h2so4 → caso4 + h2

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14
Q

metal hydroxide + acid

A

salt and water
2naoh +h2s04 → na2so4 +h20

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15
Q

metal oxide and acid

A

salt and water
Mgo + 2hcl → mgcl + h20

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16
Q

metal carbonate and acid

A

salt co2 and water
li2c03 +2hno3 → 2lino3 + co2 + h20

17
Q

titrations

A

used to work out the concentration of an acid or an alkali

18
Q

titration method

A

have acid or alkali in burette with known concentration
have acid or alkali with unknown conc but known volume in conical flask
add few drops of indicator
add chemical. into burette 2 conical flaks until indicator
add drop by drop near end point
read how much Chemical was added from burette to neutralise the chemical in bottom of conceal flask
read at bottom of meniscus
record to 2dp and repeat until you get 2 concordant results

19
Q

making a standard solution

A

weigh solid amount precisely using a balance glass rod and weighing boat
transfer sold from weighing boat to beaker
wash any solid left behind into beaker using deionised water
dissolve fully using deionised water
stir to ensure solid is fully dissolved
transfer solution to volumetric flask
use funnel to avoid spillage
rinse beaker glass rod into flask to make sure most solution is transferred
more deionised water to fill to graduation line
invert flask a few times to ensure its thoroughly mixed

as chemistry (13 decks)

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