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chemistry > 3.4 - Atmosphere + Acids > Flashcards

3.4 - Atmosphere + Acids Flashcards

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1
Q

What 4 gases make up our atmosphere?

A

-nitrogen
-oxygen
-argon
-carbon dioxide

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2
Q

How do we measure the percentage of oxygen in the air?

A

reacting it with another metal - e.g. copper

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3
Q

Why might we not always get an accurate result when measuring the percentage of oxygen in the air?

A

-metal wasn’t heated for long enough
-leak in apparatus

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4
Q

Element combustion is when…

A

an element reacts with oxygen to produce an oxide

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5
Q

Metal + Oxygen —>

A

Metal Oxide

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6
Q

Non-Metal + Oxygen —>

A

Non-Metal Dioxide

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7
Q

Magnesium + Oxygen - what are the observations?

A

-bright white light
-white powder formed

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8
Q

Sulphur + Oxygen - what are the observations?

A

blue flame

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9
Q

Hydrogen + Oxygen - what are the observations?

A

squeaky pop

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10
Q

What is the charge of Fe (II)?

A

+2

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11
Q

What is the charge of Ag?

A

+1

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12
Q

What is the charge of Fe (III)?

A

+3

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13
Q

What is the charge of Cu?

A

+2

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14
Q

What is the charge of Zn?

A

+2

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15
Q

What is the charge of Pb?

A

+2

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16
Q

What is the chemical test for oxygen?

A

relighting a glowing splint

17
Q

When metal oxides are dissolved in water they form…

A

ALKALINE solutions

18
Q

When non-metal dioxides are dissolved in water they form…

A

ACIDIC solutions

19
Q

What is the percentage of nitrogen in our atmosphere?

A

78%

20
Q

What is the percentage of oxygen in our atmosphere?

A

21%

21
Q

What is the percentage of argon in our atmosphere?

A

0.96%

22
Q

What is the percentage of carbon dioxide in our atmosphere?

A

0.04%

23
Q

What is the definition of an acid?

A

H+ donor

24
Q

What is the definition of a base?

A

H+ acceptor

25
Q

What is the definition of an alkali?

A

OH- donor

26
Q

What is a noble gas?

A

group 8 elements

chemistry (15 decks)

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