Laboratory 2 Flashcards

1
Q

The predominant elements in organic compounds

A

Carbon and hydrogen

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2
Q

The detection of various elements present in a compound

A

Qualitative analysis

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3
Q

What happens when there is a production of CO2 in lime water?

A

lime water turns milky

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4
Q

What will happen if hydrogen is present?

A

It forms water vapor then CuSO4 will turn blue when it passes.

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5
Q

What is/are the test for detecting nitrogen?

A

Soda-lime test

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6
Q

The reagent used in the soda-lime test

A

Urea

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7
Q

The indication that nitrogen is present in the compound.

A

Ammonia gas is produced

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8
Q

What is/are the test used in detecting halogens?

A

Beilstein and Silver Nitrate Test

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9
Q

Difference between the two tests for halogens?

A

Beilstein is a flame test where it is the basis for the indication of halogens. Silver Nitrate test is the the solution of silver nitrate and nitric acid form, producing silver halide

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10
Q

What is the result of Beilstein test?

A

Green flame that indicates the presence of halogen

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11
Q

The compound responsible for the green flame

A

Chlorine

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12
Q

The results of the Silver Nitrate Test.

A

White precipitate

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13
Q

The test used in detecting oxygens.

A

Ferrox Test

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14
Q

What is the color of the copper loop without chloroform?

A

No change in color.

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15
Q

Which compounds have positive results in the ferrox test? Cite the results.

A

Acetone, deep red in color. Ethyl alcohol, reddish-brown.

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16
Q

Which compound is responsible for the brownish-black precipitate?

A

Cysteine

17
Q

The reagent in the lead-acetate test?

A

Cysteine

18
Q

Difference between the classifications of alcohol.

A
  1. Primary-oxidized to aldehydes
  2. secondary- oxidized to ketones
  3. Tertiary- cannot be oxidized
19
Q

The test used to oxidize functional groups

A

Chromic Acid Test

20
Q

Which alcohols are positive in the chromic acid test?

A

1- propanol and 2-methyl propanol

21
Q

The difference in reactivity of alcohols with hydrogen and halides

A

Lucas Test

22
Q

Which are positive in the Lucas Test?

A

2-butanol (secondary) reacts after a few minutes

2-methyl2-propanol (tertiary) has immediate cloudiness.

23
Q

The catalyst in esterification.

A

Sulfuric acid

24
Q

The results indicated in esterification.

A

Brownish color of mixture after the reaction.

25
Q

The results in the reaction with methanol and copper oxide.

A

Pinkish layer in the copper wire

26
Q

The results obtained after the exposure of copper oxide in ethanol.

A

Brownish-black layer of copper wire.

27
Q

The tests for detecting oil and glycerol

A

Acrolein test

28
Q

The addition of chloroform and Hubble’s reagent

A

Hubble’s Test

29
Q

Conversion of glucose to alcohol

A

Fermentation Test

30
Q

What test can be used to detect the production of ethyl alcohol?

A

Iodoform test

31
Q

It replaces hydrogen of an aromatic hydrocarbon by -OH group

A

Phenol

32
Q

Phenol + Bromine water

A

a white precipitate of 2,4,6 tribomophenol

33
Q

An atom that replaces hydrogen atoms from hydrocarbons

A

Functional groups

34
Q

An oxygen and hydrogen atom

A

Hydroxyl

35
Q

A carbon double bonded with oxygen

A

Carbonyl

36
Q

A carbonyl attached to a hydroxyl

A

Carboxyl

37
Q

Nitrogen attached to two hydrogens

A

Amino