Carboxylic Acids and Amines

Question 1

another name for methanoic acid

Answer 1

formic acid

Question 2

another name for ethanoic acid

Answer 2

acetic acid

Question 3

another name for propanoic acid

Answer 3

propionic acid

Question 4

melting and boiling points of carboxylic acids

Answer 4

higher than their equivalent alkane due to stronger intermolecular forces between molecules

Question 5

solubility of carboxylic acids

Answer 5

short-chain carboxylic acids are soluble in water because of the polar -COOH group

Question 6

how are the C atoms numbered

Answer 6

the C in the -COOH is always numbered as position 1

Question 7

Acid reactions of carboxylic acids

Answer 7

carboxylic acids are weak acids so when dissolved in water the carbocyclic acid R-COOH donated a proto (H+) to form an acidic solution

Question 8

acid reactions of carboxylic acids equation

Answer 8

R-COOH + H2O (double arrow) R-COO(-) + H3O+

Question 9

neutralisation reactions with bases equation

Answer 9

carboxylic acid + base(NaOH) arrow salt + H2O

carboxylic acid + base (Na2CO3 or NaHCO3) arrow salt +CO2 + H2O

Question 10

Another name for aminomethane

Answer 10

methylamine

Question 11

another mane for aminoethane

Answer 11

ethylamine

Question 12

another name 1-aminopropane

Answer 12

propylamine

Question 13

melting and boiling points of amines

Answer 13

higher than equivalent alkane due to strong intermolecular forces between molecules

Question 14

solubility of amines

Answer 14

the polar C-N bonds makes short-chain amines soluble in water

Question 15

base reactions of amines

Answer 15

amines are weak bases so when dissolved in water, the amine R-NH2 accepts a proto (H+) to form a basic solution

Question 16

base reactions of amines equation

Answer 16

R-NH2 +H2O (double arrow) R-NH3+) + OH-

Question 17

neutralisation reactions with acids equation

Answer 17

amine +acid (HCl) arrow Salt