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Chemistry MA > carboxylic acids > Flashcards

carboxylic acids Flashcards

1
Q

what is the functional group of carboxylic acid?

A

-COOH

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2
Q

draw out the functional group of carboxylic acids

A

-C-O-H
II
O

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3
Q

what is vinegar in relation to ethanoic acid?

A

vinegar is an aqueous solution containing ethanoic acid

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4
Q

how are carboxylic acids formed?

A

it is formed by the oxidation of the corresponding alcohols, e.g., ethanoic acid is formed when ethanol is left in the air or oxidised using potassium dichromate (VI) in dilute sulfuric acid

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5
Q

what is the molecular formula of methanoic acid?

A

CH2O2

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6
Q

what is the molecular formula of ethanoic acid?

A

C2H4O2

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7
Q

what is the molecular formula of propanoic acid?

A

C3H6O2

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8
Q

what is the molecular formula of butanoic acid?

A

C4H8O2

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9
Q

what is the structural formula of methanoic acid?

A

HCOOH

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10
Q

what is the structural formula of ethanoic acid?

A

CH3COOH

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11
Q

what is the structural formula of propanoic acid?

A

CH3CH2COOH

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12
Q

what is the structural formula of butanoic acid?

A

CH3CH2CH2COOH

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13
Q

draw out the displayed formula for methanoic acid, ethanoic acid, propanoic acid, butanoic

A

check in p.294

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14
Q

what type of acid is carboxylic acid?

A

they are weak acids?

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15
Q

what are weak acids?

A

acids with a pH of about 3-5 depending on conc. of solution.

A weak acid is an acid that only partially dissociates into ions in water, producing a relatively small number of hydrogen ions (Ht). Weak acids have a relatively low pH value.

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16
Q

how does ethanoic acid react with water?

A

it reacts the same way other dilute acids react but MORE SLOWLY.
metal + acid -> salt + hydrogen
metal hydroxide/oxide + acid -> salt + water
metal carbonate + acid -> salt + carbon dioxide

17
Q

what happens when ethanoic acid reacts with magnesium?

A

lots of fizzing. salt and hydrogen formed. the salt is called magnesium ethanoate

18
Q

what is the name of salts that contain ethanoic, methanoic etc., acids in them?

A

methanoate
ethanoate
propanoate
butanoate

19
Q

what is an ethanoate ion?

A

part of a salt containing athanoic acid
it looks like CH3COO-

20
Q

is an ethanoic acid is weak?

A

it only partially dissociates in solution

21
Q

what is the equation for ethanoic acid and sodium hydroxide? word

A

ethanoic acid + sodium hydroxide-> sodium ethanoate + water

22
Q

what is the equation for ethanoic acid and sodium hydroxide? symbol (structural)

A

2CH3COOH + NaOH -> 2CH3COO-Na+ + H2O

23
Q

what is the equation for ethanoic acid and magnesium ? word

A

magnesium + ethanoic acid -> water + magnesium ethanoate

24
Q

what is the equation for ethanoic acid and magnesium ? symbol

A

CH3COOH + Mg -> (CH3COO)2Mg + H2O

25
Q
A

Chemistry MA (17 decks)

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