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CDU FINALS > CHEMLAB > Flashcards

CHEMLAB Flashcards

1
Q

what are the factors affecting solubility?

A

agitation, particle size, and temperature.

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2
Q

define agitation

A

increases solubility (collide and interact)

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3
Q

define particle size

A

the smaller, the more surface area

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4
Q

define temperature

A

the higher the temp, the more kinetic energy causing it to move faster.

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5
Q

NACI +H20 soluble or insoluble

A

soluble

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6
Q

CCL4 +NACI soluble or insoluble

A

INSOLUBLE

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7
Q

C6H5COOH +H20 soluble or insoluble

A

INSOLUBLE

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8
Q

C6H5COOH +CCL4 soluble or insoluble

A

SOLUBLE

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9
Q

substances with the same __________ will dissolve together

A

polarity/ composition

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10
Q

is ethyl alchohol miscible or immiscible in water?

A

miscible

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11
Q

What happens if you combine water with CCL4?

A

A layer is formed between the two which means they do not form a homogenous mixture. they are IMMISCIBLE

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12
Q

distilled water. (glow, electrical conductivity, type of electrolyte)

A

no glow, non-conductor, non-electrolyte

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13
Q

tap water. (glow, electrical conductivity, type of electrolyte)

A

dim glow, poor-conductor, weak-electrolyte

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14
Q

ethanol C2H5OH (glow, electrical conductivity, type of electrolyte)

A

no glow, non-conductor, non-electrolyte

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15
Q

carbon tetrachloride CCl4 (glow, electrical conductivity, type of electrolyte)

A

no glow, non-conductor, non-electrolyte

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16
Q

1m acetic acid CH3COOH (glow, electrical conductivity, type of electrolyte)

A

dim glow, poor-conductor, weak-electrolyte

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17
Q

1m hydrocholoric acid HCI (glow, electrical conductivity, type of electrolyte)

A

bright, good-conductor, strong-electrolyte

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18
Q

1m sodium chloride NaCI HCI (glow, electrical conductivity, type of electrolyte)

A

bright, good-conductor, strong-electrolyte

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19
Q

1m sodium hydroxide NaOH HCI (glow, electrical conductivity, type of electrolyte)

A

bright, good-conductor, strong-electrolyte

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20
Q

1m ammonium chloride NH4CI (glow, electrical conductivity, type of electrolyte)

A

bright, good-conductor, strong-electrolyte

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21
Q

1m ammonium hydroxide NaOH HCI (glow, electrical conductivity, type of electrolyte)

A

dim glow, poor-conductor, weak-electrolyte

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22
Q

properties of magnesium ribbon

A

metallic, grey, thin, fla, element

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23
Q

what happens if you ignite the magnesium ribbon?

A

It reacts with oxygen gas and produces a white light

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24
Q

what is the substance left after you ignite the magnesium ribbon?

A

white powdery ash, magnesium oxide (MgO)

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25
Q

what is the evidence left of a chemical reaction after you ignite the magnesium ribbon?

A

change color from grey to white, white light

26
Q

balanced equation of a magnesium ribbon

A

2Mg+O2 – 2MgO

27
Q

what type of chemical reaction has taken place in magnesium ribbon

A

combination

28
Q

copper wire before heating and after heating properties

A

before= reddish brown
after = green flame

29
Q

chemical reaction evidence in copper wire

A

heated = turns black and into a ball-like structure
unheated doesnt change

30
Q

balanced equation of copper wire

A

2Cu + O2 — 2CuO (combination)

31
Q

powder sulfur and iron fillings heated and unheated. COMPARE

A

unheated = iron fillings stuck to magnet, leaving behind sulfur
heated = not attracted, no longer separates

32
Q

powder sulfur and iron fillings heated and unheated. Which of the two had a chemical reaction?

A

heated.

33
Q

powder sulfur and iron fillings heated and unheated. Which of the two is a compound?

A

heated. the two combine and create ferrous sulfide

34
Q

powder sulfur and iron fillings heated and unheated. balanced equation

A

Fe + S — FeS (combination)

35
Q

Glowing sprinter (mercuric oxide). What happens if you heat the glowing test tube?

A

glowed brighter

36
Q

Glowing sprinter (mercuric oxide). What gas was produced

A

due to combustion, it produced oxygen gas

37
Q

Glowing sprinter (mercuric oxide). chemical evidence

A

orange to dark brown (glowed brighter)

37
Q

Glowing sprinter (mercuric oxide). balanced equation

A

2Hgo — 2Hg + O2 (decomposition)

38
Q

IRON NAIL (copper sulfate) appearance of the substance on the nail

A

reddish brown coating

39
Q

IRON NAIL (copper sulfate) what is the substance on the nail?

A

copper

40
Q

IRON NAIL (copper sulfate) balanced equation

A

CuSb4 + Fe —FeSO4 + Cu (single replacement)

41
Q

Which is more active, iron or copper?

A

Iron because it is higher than copper in the activity of metals

42
Q

Mossy Zinc Properties

A

metallic substance, shiny and silver

43
Q

Mossy Zinc + Concentrated HCI. glowing splinter. observe

A

thick and white gas and had a strong smell. moving vigorously

44
Q

Mossy Zinc + Concentrated HCI. glowing splinter. what has was produxed

A

hydrogen gas because zinc was more active. popping sound

45
Q

Mossy Zinc + Concentrated HCI. glowing splinter. exothermic or endothermic?

A

exothermic since zinc replaced hydrogen, released heat and produced hydrogen gas

46
Q

Mossy Zinc + Concentrated HCI. glowing splinter. balanced eq

A

2HCI + Zn — ZnCl2 + H2 (single replacement)

47
Q

Which is more active, hydrogen or zinc?

A

zinc because it replaced hydrogen meaning zinc is higher in rank in the electromagnetic series

48
Q

NaHCO3 to con HCI then glowing plinter. observe

A

fizzing sound due to carbon dioxide gas.

49
Q

NaHCO3 to con HCI then glowing plinter. gas produced

A

carbon dioxide gas, compound

50
Q

NaHCO3 to con HCI then glowing plinter. exothermic or endothermic?

A

endothermic because heat was absorbed

51
Q

CaCl2 and Na2CO3. evidence

A

white precipitate

52
Q

NH4BR

A

NH4zCO3 - clear nad colourless
AGNO3 - pale cream ppt. AgBr
Flame Test - green

53
Q

NH4CI

A

NH4zCO3 - clear and colorless
AGNO3 - white ppt. AgCl
Flame Test - green

54
Q

NH4I

A

NH4zCO3 - yellowish
AGNO3 - pale yellow ppt. Agl
Flame Test- green

55
Q

Ba(NO3)2

A

NH4zCO3 - white ppt BaCO3
AGNO3 - clear and colorless
Flame Test - yellow

56
Q

Ca (NO3)2

A

NH4zCO3 - white ppt
AGNO3 - clear and colorless
Flame Test - red-orange

57
Q

Sr (NO3)2

A

NH4zCO3 - white ppt
AGNO3 - clear and colorless
Flame Test - crimson red

58
Q

KNO3

A

NH4zCO3 - clear and colorless
AGNO3 - clear and colorless
Flame Test - pink/lavender

59
Q

NaNO3

A

NH4zCO3 - clear and colorless
AGNO3 - clear and colorless
Flame Test - yellow

CDU FINALS (5 decks)

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