闪卡自测
What is a carboxylic acid?
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闪卡 1
问题
What is a carboxylic acid?
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答案
A carboxylic acid is a compound containing the functional group carboxyl, -COOH.
闪卡 2
问题
State the general formula for carboxylic acids.
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答案
The general formula of a carboxylic acid is CnH2n+1COOH or RCOOH.
闪卡 3
问题
True or False? The naming of a carboxylic acid follows the pattern alkan + oic acid.
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答案
True. The naming of a carboxylic acid follows the pattern alkan + oic acid.
闪卡 4
问题
Which carboxylic acid is found in vinegar?
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答案
Vinegar is an aqueous solution of ethanoic acid and contains about 5% of the acid by volume.
闪卡 5
问题
What is the molecular formula of methanoic acid?
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答案
The molecular formula of methanoic acid is HCOOH.
闪卡 6
问题
What is the molecular formula of ethanoic acid?
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答案
The molecular formula of ethanoic acid is CH3COOH.
闪卡 7
问题
What is the molecular formula of propanoic acid?
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答案
The molecular formula of propanoic acid is C2H5COOH.
闪卡 8
问题
What is the empirical formula of ethanoic acid?
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答案
The empirical formula ethanoic acid is CH2O
闪卡 9
问题
What is the molecular formula of butanoic acid?
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答案
The molecular formula of butanoic acid is C3H7COOH.
闪卡 10
问题
True or False? Carboxylic acids react with metals to form a salt and hydrogen.
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答案
True. Carboxylic acids react with metals to form a salt and hydrogen.
闪卡 11
问题
True or False? Carboxylic acids react with carbonates to form a salt, water and carbon dioxide gas.
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答案
True. Carboxylic acids react with carbonates to form a salt, water and carbon dioxide gas.
闪卡 12
问题
What type of reactions of carboxylic acids make a salt and water?
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答案
Carboxylic acids take part in neutralisation reactions to produce salt and water.
闪卡 13
问题
What is the common name for the acid found in vinegar?
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答案
Acetic acid ( known to chemists as ethanoic acid) is the acid used to make vinegar.
闪卡 14
问题
True or False? The reaction equation between magnesium and ethanoic acid is: 2CH3COOH + Mg → (CH3COO)2Mg + H2
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答案
True. Carboxylic acids behave like other acids and produce a salt and hydrogen with magnesium: 2CH3COOH + Mg → (CH3COO)2Mg + H2
闪卡 15
问题
State the products of the reaction between propanoic acid and potassium hydroxide.
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答案
The products of the reaction between propanoic acid and potassium hydroxide are potassium propanoate and water. For reference the equation is: CH3CH2COOH + KOH → CH3CH2COOK + H2O
闪卡 16
问题
State the word equation for this reaction: 2CH3CH2CH2COOH + K2CO3 → 2CH3CH2CH2COOK + H2O + CO2
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答案
The word equation for the reaction is: butanoic acid + potassium carbonate → potassium butanoate + carbon dioxide + water
闪卡 17
问题
Define neutralisation reaction.
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答案
A neutralisation reaction is a chemical reaction between an acid and a base that produces a salt and water.