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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
what is the evidence left of a chemical reaction after you ignite the magnesium ribbon?
change color from grey to white, white light
26
balanced equation of a magnesium ribbon
2Mg+O2 -- 2MgO
27
what type of chemical reaction has taken place in magnesium ribbon
combination
28
copper wire before heating and after heating properties
before= reddish brown after = green flame
29
chemical reaction evidence in copper wire
heated = turns black and into a ball-like structure unheated doesnt change
30
balanced equation of copper wire
2Cu + O2 — 2CuO (combination)
31
powder sulfur and iron fillings heated and unheated. COMPARE
unheated = iron fillings stuck to magnet, leaving behind sulfur heated = not attracted, no longer separates
32
powder sulfur and iron fillings heated and unheated. Which of the two had a chemical reaction?
heated.
33
powder sulfur and iron fillings heated and unheated. Which of the two is a compound?
heated. the two combine and create ferrous sulfide
34
powder sulfur and iron fillings heated and unheated. balanced equation
Fe + S — FeS (combination)
35
Glowing sprinter (mercuric oxide). What happens if you heat the glowing test tube?
glowed brighter
36
Glowing sprinter (mercuric oxide). What gas was produced
due to combustion, it produced oxygen gas
37
Glowing sprinter (mercuric oxide). chemical evidence
orange to dark brown (glowed brighter)
37
Glowing sprinter (mercuric oxide). balanced equation
2Hgo — 2Hg + O2 (decomposition)
38
IRON NAIL (copper sulfate) appearance of the substance on the nail
reddish brown coating
39
IRON NAIL (copper sulfate) what is the substance on the nail?
copper
40
IRON NAIL (copper sulfate) balanced equation
CuSb4 + Fe —FeSO4 + Cu (single replacement)
41
Which is more active, iron or copper?
Iron because it is higher than copper in the activity of metals
42
Mossy Zinc Properties
metallic substance, shiny and silver
43
Mossy Zinc + Concentrated HCI. glowing splinter. observe
thick and white gas and had a strong smell. moving vigorously
44
Mossy Zinc + Concentrated HCI. glowing splinter. what has was produxed
hydrogen gas because zinc was more active. popping sound
45
Mossy Zinc + Concentrated HCI. glowing splinter. exothermic or endothermic?
exothermic since zinc replaced hydrogen, released heat and produced hydrogen gas
46
Mossy Zinc + Concentrated HCI. glowing splinter. balanced eq
2HCI + Zn — ZnCl2 + H2 (single replacement)
47
Which is more active, hydrogen or zinc?
zinc because it replaced hydrogen meaning zinc is higher in rank in the electromagnetic series
48
NaHCO3 to con HCI then glowing plinter. observe
fizzing sound due to carbon dioxide gas.
49
NaHCO3 to con HCI then glowing plinter. gas produced
carbon dioxide gas, compound
50
NaHCO3 to con HCI then glowing plinter. exothermic or endothermic?
endothermic because heat was absorbed
51
CaCl2 and Na2CO3. evidence
white precipitate
52
NH4BR
NH4zCO3 - clear nad colourless AGNO3 - pale cream ppt. AgBr Flame Test - green
53
NH4CI
NH4zCO3 - clear and colorless AGNO3 - white ppt. AgCl Flame Test - green
54
NH4I
NH4zCO3 - yellowish AGNO3 - pale yellow ppt. Agl Flame Test- green
55
Ba(NO3)2
NH4zCO3 - white ppt BaCO3 AGNO3 - clear and colorless Flame Test - yellow
56
Ca (NO3)2
NH4zCO3 - white ppt AGNO3 - clear and colorless Flame Test - red-orange
57
Sr (NO3)2
NH4zCO3 - white ppt AGNO3 - clear and colorless Flame Test - crimson red
58
KNO3
NH4zCO3 - clear and colorless AGNO3 - clear and colorless Flame Test - pink/lavender
59
NaNO3
NH4zCO3 - clear and colorless AGNO3 - clear and colorless Flame Test - yellow

CDU FINALS (5 decks)

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