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CHEM LAB > Experiment 8 > Flashcards

Experiment 8 Flashcards

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1
Q

formed by the decomposition of organic materials

A

methane

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2
Q

methane comes from dead leaves and stagnant marshes, hence the name?

A

Marsh gas

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3
Q

methane is aka by miners?

A

firedamp

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4
Q

what does the digestion of certain types of food in the body lead to?

A

production of methane around 50% of the intestinal gas

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5
Q

how do you prepare methane in a laboratory how do you collect methane?

A

Soda lime and anhydrous sodium acetate, water displacement

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6
Q

it is the first member of the alkyne series

A

acetylene

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7
Q

how many bonds does the acetylene have?

A

triple bond

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8
Q

how is acetyelene commonly prepared in the lab?

A

through action of water on calcium carbide

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9
Q

what does acetylene also produce?

A

ethylene

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10
Q

it serves as to differentiate olefins and acetylene hydrocarbons that carry at least one acidic hydrogen

A

acetylene

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11
Q

describe acetylene

A

colorless, odorless gas and slightly soluble

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12
Q

calcium carbide chemical formula?

A

CaC2

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13
Q

Potassium permanganate

A

KMnO4

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14
Q

Hexane

A

C6H14

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15
Q

Bromine

A

Br2

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16
Q

Alcohol

A

CH3CH2OH

17
Q

Iodine

A

I

18
Q

Acetylene

A

C2H2

19
Q

Cuprous Chloride

A

CuCl

20
Q

how was the acetylene gas collected?

A

Water displacement

21
Q

what was placed in a distilling flask?

A

Calcium carbide

22
Q

why was there no reaction of the chemicals when potassium permanganate was added to hexane?

A

Due to it being hexane is a saturated hydrocarbon

23
Q

what happened when hexane was added to bromine water?

A

the yellow orange solution turned into violet solution where it was catalyzed under the exposure of sunlight

24
Q

give the names of the organic products of both alkane and alkyne products

A

Alkane: Methane, ethane, propane and butane
Alkyne: Ethyne, propyne, butyne and methyne

25
Q

what happens when alcoholic iodine is added to acetylene?

A

gas bubbles is present

26
Q

what is the indication of that there is presence of alkane in the solution?

A

yellow-orange luminous flame is present

27
Q

what is the indication that acetylene is present in the solution?

A

formation of chocolate brown precipitation known as Cuprous acetylide or CU2C2

28
Q

what is the equation of the reaction between water and calcium carbide? give its chemical equation

A

H2O + CaC2 —-> C2H2 + Ca(OH)2
water + Calcium carbide —-> Acetylene + Calcium hydroxide

CHEM LAB (19 decks)

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