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C16- ORGANIC ANALYSIS > 16.1- TEST-TUBE REACTIONS > Flashcards

16.1- TEST-TUBE REACTIONS Flashcards

1
Q

What can a compound being acidic suggest?

A

carboxylic acid?

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2
Q

What can a compound being solid suggest?

A

long carbon chain or ionic bonding

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3
Q

What can a compound being liquid suggest?

A

medium length carbon chain or polar or hydrogen bonding

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4
Q

What can a compound being a gas suggest?

A

short carbon chain, little or no polarity

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5
Q

What can a compound being able to dissolve in water suggest?

A

polar groups

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6
Q

What can a compound not being able to dissolve in water suggest?

A

no polar groups

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7
Q

What is the alkene functional group?

A

-C=C

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8
Q

What is the alkene test?

A

shake with bromine water

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9
Q

What is the result for alkenes with bromine water?

A

orange colour disappears

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10
Q

What is the halogenoalkane functional group?

A

R-X

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11
Q

What is the test for halogenoalkanes?

A
  1. add NaOH(aq) + warm
  2. acidify with HNO3
  3. add AgNO3(aq)
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12
Q

What is the positive result from the halogenoalkane test?

A

precipitate of AgX

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13
Q

What is the alcohol functional group?

A

R-OH

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14
Q

What is the test for alcohols?

A

add acidified K2Cr2O7

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15
Q

What is the positive result from the alcohol test?

A

orange colour turns green with primary or secondary alcohols (also with aldehydes)

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16
Q

What is the aldehydes functional group?

A

R-CHO

17
Q

What is the test for aldehydes?

A

warm with Fehling’s solution
or
warm with Tollen’s reagent

18
Q

What is the positive result from the aldehydes test?

A

blue colour turns to red precipitate
or
silver mirror forms

19
Q

What is the carboxylic acid functional group?

A

R-COOH

20
Q

What is the test for carboxylic acids?

A

add NaHCO3(aq)

21
Q

What is the positive result from the carboxylic acids test?

A

CO2 given off

C16- ORGANIC ANALYSIS (3 decks)

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