Flashcards in Carboxylic Acids and Esters Basic Reactions Deck (11)
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1
Give the word and symbol equations for Magnesium metal reacting with aqueous Ethanoic Acid.
Magnesium + Ethanoic Acid ----> Magnesium Ethanoate +
Hydrogen Gas
Mg(s) + 2CH3COOH(aq) ---> (CH3COO)2Mg(aq) + H2(g)
2
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.
3
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)
4
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 +
CH3COOH
5
What are the two methods of hydrolysis for esters?
Acid and alkaline hydrolysis.
6
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.
7
What is the advantage of alkaline hydrolysis over acid hydrolysis of an ester?
Reaction goes to completion/does not produce equilibrium mixture.
8
What are the conditions necessary for the hydrolysis of an ester, using an acid or alkali?
Heating under reflux.
9
What does acid hydrolysis of an ester produce?
A carboxylic acid and an alcohol.
10
What does alkaline hydrolysis of an ester produce?
An alcohol and a salt of the carboxylic acid.
11
