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Chemistry Rev 3rd Form > 3.4 Atmosphere and Acids > Flashcards

3.4 Atmosphere and Acids Flashcards

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1
Q

How much of the earths dry air contains Nitrogen, Oxygen, Argon and Carbon Dioxide?

A

N – 78%
O – 21%
Ar – 0.9%
CO2 – 0.04%

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2
Q

Define an indicator?

A

Liquid that changes colour in different pH levels

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3
Q

What colours will methyl orange change in: Acid, Alkali; Neutral?

A

Red, Yellow, Yellow

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4
Q

What colours will Phenolphthalein change in: Acid, Alkali; Neutral?

A

Colourless, Colourless, Pink

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5
Q

What colours will Red Litmus change in: Acid, Alkali; Neutral?

A

Red, Red, Blue

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6
Q

What colours will Blue Litmus change in: Acid, Alkali; Neutral?

A

Red, Blue, Blue

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7
Q

Name 2 alkalis?

A

Sodium hydroxide
Potassium hydroxide

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8
Q

Name 2 acids?

A

Any Metal Oxide (Magnesium oxide)

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9
Q

Define an acid?

A

Gives H+ ions off

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10
Q

Define Base?

A

Will accept the H+ donated by acids

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11
Q

Define Alkali?

A

Will donate OH- ions when dissolved in water

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12
Q

Give the Formula for hydroxide?

A

OH-

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13
Q

Give the Formula for Nitrate?

A

NO -
3

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14
Q

Give the Formula for carbonate?

A

CO 2-
3

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15
Q

Give the Formula for sulphate?

A

SO 2-
4

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16
Q

Give the Formula for ammonium?

A

NH +
4

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17
Q

Give the Formula for phosphate?

A

Po
4

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18
Q

Give the Formula for sulfuric acid?

A

H SO
2 4

19
Q

Give the Formula for hydrochloric acid?

A

HCL

20
Q

Give the Formula for nitric acid?

A

HNO
3

21
Q

Give the Formula for phosphoric acid?

A

H PO
3 4

22
Q

What does an acid and a carbonate make?

A

Salt + water + CO2

23
Q

What does an acid and metal oxide make?

A

Salt + water

24
Q

What does an acid and metal hydroxide make?

A

Salt + Water

25
Q

What does an acid and Ammonia make?

A

Ammonium salt

26
Q

What does an acid and a metal make?

A

Salt + Hydrogen

27
Q

What causes things to become insoluble

A

Oxides, Hydroxides, Carbonates,
Lead, Barium and Calcium Sulfates
Silver & Lead Halides

28
Q

What causes things to become soluble

A

All of grp 1
All nitrates
Most halides
Most sulphates

29
Q

What causes things to become insoluble

A

Oxides, Hydroxides, Carbonates,
Lead, Barium and Calcium Sulphates
Silver & Lead Halides

30
Q

Explain how you find a gas product?

A

Light a splint and put into gas, if makes a squeaky pop sound = Hydrogen

31
Q

Give 2 observations you’d make from Mg metal reacting with sulphuric acid?

A

A gas is produced and metal disappears

32
Q

Name the first step of the copper sulphate practical?

A

Measure out 40 cm3 of sulfuric acid into a 100 cm3 beaker

33
Q

Name the second step of the copper sulphate practical?

A

Weigh out roughly 4 g of copper oxide in a weighing boat.

34
Q

Name the third step of the copper sulphate practical?

A

Gently heat the acid for 2 minutes

35
Q

Name the fourth step of the copper sulphate practical?

A

Add the copper oxide to the sulphuric acid, stir with a glass rod. Add the copper oxide until no more will disappear

36
Q

Name the fifth step of the copper sulphate practical?

A

Wait 5 minutes for the mixture to cool.

37
Q

Name the sixth step of the copper sulphate practical?

A

Filter the mixture into an evaporating basin.

38
Q

Name the seventh step of the copper sulphate practical?

A

Heat the filtrate with a bunsan burner until crystals start forming at the edges

39
Q

Name the eighth step of the copper sulphate practical?

A

Leave to cool for 5 minutes, then place into the tray

40
Q

Name the ninth step of the copper sulphate practical?

A

Leave crystals to full form over a few days

41
Q

Give the formula of the percentage of O2 in air practical?

A

% of Air that is O2 = Vol of air/ volume of air before rusting x 100

42
Q

What can change the results to be less in the percentage of O2 in air practical?

A

The reaction may not have been completed

43
Q

What can change the results to be higher in the percentage of O2 air practical

A

Chemistry Rev 3rd Form (5 decks)

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