chemistry - carboxylic acids

chemistry igcse edexcel carboxylic acids flashcards

what is the functional group of carboxylic acids?

COOH

what are the first 4 carboxylic acids called?

methanoic acid

ethanoic acid

propanoic acid

butanoic acid

what is ethanoic acid also known as?

vinegar

what is the general formula of carboxylic acids?

C_nH_2nCOOH (where n is the number of carbon atoms -1)

what is the molecular formula of methanoic acid?

CH₂O₂

what is the molecular formula of ethanoic acid?

C₂H₄O₂

what is the molecular formula of propanoic acid?

C₃H₆O₂

what is the molecular formula of butanoic acid?

C₄H₈O₂

what is the structural formula of methanoic acid?

HCOOH

what is the structural formula of ethanoic acid?

CH₃COOH

what is the structural formula of propanoic acid?

CH₃CH₂COOH

what is the structural formula of butanoic acid?

CH₃CH₂CH₂COOH

what is the displayed formula of methanoic acid?

what is the displayed formula of ethanoic acid?

what is the displayed formula of propanoic acid?

what is the displayed formula of butanoic acid?

how are carboxylic acids formed?

oxidation of corresponding alcohol

what pH do carboxylic acids have?

3-5 - weak acids

what is the general word equation for the reaction of a carboxylic acid with a metal?

carboxylic acid + metal → salt + hydrogen

what do carboxylic acid salts end with?

-anoate

give the word equation for the reaction between ethanoic acid and magnesium

ethanoic acid + magnesium → magnesium ethanoate + hydrogen

give the chemical equation for the reaction between ethanoic acid and magnesium

2CH₃COOH (aq) + Mg (s) → (CH₃COO)₂Mg (aq) + H_{2 (g)}

what will you see when a carboxylic acid reacts with a metal?

bubbles

what is the formula of an ethanoate ion?

CH₃COO^-

what is the general word equation for the reaction between carboxylic acids and metal carbonates?

carboxylic acid + metal carbonate → salt + carbon dioxide + water

give the word equation for the reaction between ethanoic acid and sodium carbonate

ethanoic acid + sodium carbonate → sodium ethanoate + carbon dioxide + water

give the chemical equation for the reaction between ethanoic acid and sodium carbonate

2CH₃COOH (aq) + Na₂CO₃ (aq) → 2CH₃COONa (aq) + CO_{2 (g)} + H₂O (l)