Experiment 8

Question 1

formed by the decomposition of organic materials

Answer 1

methane

Question 2

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

Answer 2

Marsh gas

Question 3

methane is aka by miners?

Answer 3

firedamp

Question 4

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

Answer 4

production of methane around 50% of the intestinal gas

Question 5

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

Answer 5

Soda lime and anhydrous sodium acetate, water displacement

Question 6

it is the first member of the alkyne series

Answer 6

acetylene

Question 7

how many bonds does the acetylene have?

Answer 7

triple bond

Question 8

how is acetyelene commonly prepared in the lab?

Answer 8

through action of water on calcium carbide

Question 9

what does acetylene also produce?

Answer 9

ethylene

Question 10

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

Answer 10

acetylene

Question 11

describe acetylene

Answer 11

colorless, odorless gas and slightly soluble

Question 12

calcium carbide chemical formula?

Answer 12

CaC2

Question 13

Potassium permanganate

Answer 13

KMnO4

Question 14

Hexane

Answer 14

C6H14

Question 15

Bromine

Answer 15

Br2

Question 16

Alcohol

Answer 16

CH3CH2OH

Question 17

Iodine

Answer 17

I

Question 18

Acetylene

Answer 18

C2H2

Question 19

Cuprous Chloride

Answer 19

CuCl

Question 20

how was the acetylene gas collected?

Answer 20

Water displacement

Question 21

what was placed in a distilling flask?

Answer 21

Calcium carbide

Question 22

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

Answer 22

Due to it being hexane is a saturated hydrocarbon

Question 23

what happened when hexane was added to bromine water?

Answer 23

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

Question 24

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

Answer 24

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

Question 25

what happens when alcoholic iodine is added to acetylene?

Answer 25

gas bubbles is present

Question 26

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

Answer 26

yellow-orange luminous flame is present

Question 27

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

Answer 27

formation of chocolate brown precipitation known as Cuprous acetylide or CU2C2

Question 28

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

Answer 28

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