Flashcards in Carboxylic Acids and Esters Basic Reactions Deck (11)
Give the word and symbol equations for Magnesium metal reacting with aqueous Ethanoic Acid.
Magnesium + Ethanoic Acid ----> Magnesium Ethanoate +
Mg(s) + 2CH3COOH(aq) ---> (CH3COO)2Mg(aq) + H2(g)
Give the word and symbol equations for Ethanoic Acid reacting with Potassium Hydroxide. State the two types of species that react in this way with carboxylic acids.
Ethanoic Acid + Potassium Hydroxide ---> Potassium
Ethanoate + Water
CH3COOH(aq) +KOH(aq) ---> CH3COOK(aq) + H2O(L)
Reaction occurs with alkalis and basic metal oxides.
Give the word and symbol equations for Ethanoic Acid reacting with Calcium Carbonate.
Ethanoic Acid + Calcium Carbonate ---> Calcium Ethanoate + Water + Carbon Dioxide Gas
2CH3COOH(aq) + CaCO3(s) ---> (CH3COO)2Ca(aq) +H2O(L) +CO2(g)
Give the word and symbol equations for the two methods used to prepare an ester. State any conditions for each.
1) Carboxylic Acid + Alcohol ---> Ester + Water
CH3COOH + CH3CH2OH ---> CH3COOCH2CH3 +H2O
Conditions: Glacial ethanoic acid, heat, conc. H2SO4 catalyst
2) Acid Anhydride + Alcohol ---> Ester + Carboxylic Acid
(CH3CO)2O +CH3CH2OH ---> CH3COOCH2CH3 +
What are the two methods of hydrolysis for esters?
Acid and alkaline hydrolysis.
What is the advantage of using an acid anhydride and alcohol to prepare an ester over using a carboxylic acid and alcohol?
Acid anhydride route goes to completion/does not produce equilibrium mixture.
What is the advantage of alkaline hydrolysis over acid hydrolysis of an ester?
Reaction goes to completion/does not produce equilibrium mixture.
What are the conditions necessary for the hydrolysis of an ester, using an acid or alkali?
Heating under reflux.
What does acid hydrolysis of an ester produce?
A carboxylic acid and an alcohol.
What does alkaline hydrolysis of an ester produce?
An alcohol and a salt of the carboxylic acid.