Unit 2- Natures Chemistry Flashcards

1
Q

Definition of homologous series

A

A family of compounds with the same general formula and similar chemical properties.

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2
Q

Hydrocarbons

A

Molecules that only contain hydrogen and carbon atoms.

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3
Q

Alkane General Formula

A

Alkane General Formula: CnH2n+2

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4
Q

Isomers

A

Compounds with the same molecular formula but different structural formula.

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5
Q

General Formula of Alkenes:

A

General Formula of Alkenes: CnH2n

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6
Q

Test for Bromine Solution

A

Bromine solution is the test for unsaturation.
* Unsaturated alkenes decolourise bromine solution.
* Saturated alkanes do not decolourise bromine solution.

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7
Q

General Formula for Cycloalkanes:

A

General Formula for Cycloalkanes: CnH2n

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8
Q

Do hydrocarbons dissolve in water

A

NO, Hydrocarbons do not have a slightly positive and slightly negative side so do not dissolve in water.

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9
Q

Solubility Phrase

A

‘like dissolves like’.

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10
Q

forces of attraction

A

intermolecular bonds

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11
Q

Definition of Viscosity

A

Viscosity is the resistance a substance has to flow (e.g. syrup has a high viscosity and water has a low viscosity).

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12
Q

General Formula for Alcohols:

A

General Formula for Alcohols: CnH2n+1OH

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13
Q

What functional group does Alcohols contain

A

Alcohols are molecules that contain the hydroxyl (–OH) functional group

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14
Q

General Formula for Carboxylic acids:

A

General Formula for Carboxylic acids: CnH2n+1COOH

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15
Q

What functional group does carboxylic acids contain

A

Carboxylic acids are hydrocarbons that contain the carboxyl
(–COOH) functional group.

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16
Q

Is combustion exothermic

A

Yes

17
Q

exothermic

A

exothermic
They give out heat energy