Carboxylic acids

Last updated: 15/02/2020

WJEC A-Level Chemistry Unit 2.7 – Alcohols and carboxylic acids Carboxylic acids

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Question 1 of 20

1. Question
When a carboxylic acid releases H $^+$ ions, what type of ion is formed?
- Carboxylate ion
- Positive ion
- Boxylate ion
- Zwitterion
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Question 2 of 20

2. Question
Describe the acidity of carboxylic acids.
- They are weak acids
- They are not acids
- They are strong acids
- Only acids in solution
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Question 3 of 20

3. Question
Describe the relationship between the hydrocarbon length and the solubility of a carboxylic acid.
- As the hydrocarbon chain increases the solubility increases
- As the hydrocarbon chain increases the solubility decreases
- As the hydrocarbon chain decreases the solubility increases
- There is no relationship between the two factors
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Question 4 of 20

4. Question
Why are smaller carboxylic acids soluble in polar solvents?
- They contain hydrogen bonds
- They have weak intermolecular forces
- They contain pi and sigma bonds
- They have strong intermolecular forces
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Question 5 of 20

5. Question
What products are formed when carboxylic acids react with metals?
- Metal salt and hydrogen
- Metal salt and oxygen
- Metal salt and carbon dioxide
- Metal salt and water
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Question 6 of 20

6. Question
What products are formed when carboxylic acids react with metal oxides?
- Metal salt and water
- Metal salt and oxygen
- Metal salt and carbon dioxide
- Metal salt and hydrogen
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Question 7 of 20

7. Question
What products are formed when carboxylic acids react with metal hydroxides?
- Metal salt and water
- Metal salt and oxygen
- Metal salt and carbon dioxide
- Metal salt and hydrogen
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Question 8 of 20

8. Question
What products are formed when carboxylic acids react with metal carbonates?
- Metal salt, carbon dioxide and water
- Metal salt and water
- Metal salt and metal oxide
- Metal salt and hydrogen
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Question 9 of 20

9. Question
Name the salt formed when propanoic acid is reacted with magnesium.
- Magnesium propanoate
- Magnesium propanal
- Magnesium propanide
- Magnesium chloride
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Question 10 of 20

10. Question
Name the salt formed when ethanoic acid is reacted with calcium.
- Calcium ethanoate
- Calcium chloride
- Calcium ethanone
- Calcium ethanide
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Question 11 of 20

11. Question
Name the salt formed when pentanoic acid is reacted with barium oxide.
- Barium pentanoate
- Barium pentanomide
- Barium pentanol
- Barium chloride
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Question 12 of 20

12. Question
Name the salt formed when methanoic acid is reacted with potassium oxide
- Potassium methanoate
- Potassium methanate
- Potassium methanoide
- Potassium sulfate
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Question 13 of 20

13. Question
Name the salt formed when butanoic acid is reacted with magnesium hydroxide.
- Magnesium butanoate
- Magnesium butanate
- Magnesium butanoide
- Magnesium chloride
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Question 14 of 20

14. Question
Name the salt formed when ethanoic acid is reacted with beryllium hydroxide.
- Beryllium ethanoate
- Beryllium ethanite
- Beryllium ethanide
- Beryllium hydrate
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Question 15 of 20

15. Question
Name the salt formed when hexanoic acid is reacted with calcium carbonate.
- Calcium hexanoate
- Calcium chloride
- Calcium hexanate
- Calcium haxanide
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Question 16 of 20

16. Question
Name the salt formed when methanoic acid is reacted with lithium carbonate.
- Lithium methanoate
- Lithium hydride
- Lithium methanoide
- Lithium hydrate
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Question 17 of 20

17. Question
Write the equation for the reaction between ethanoic acid and sodium hydroxide.
- $NaOH + CH_3COOH - > CH_3COONa + H_2O$
- $NaOH + 2CH_3COOH - > 2CH_3COONa + H_2$
- $NaOH + 2CH_3COOH - > 2(CH_3COO)_2Na + H_2O$
- $NaOH + CH_3COOH - > (CH_3COO)_2Na + H_2$
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Question 18 of 20

18. Question
Write the equation for the reaction between ethanoic acid and potassium.
- $2K + 2CH_3COOH - > 2CH_3COOK+ H_2$
- $2K + CH_3COOH - > CH_3COOK+ H_2$
- $2K + 2CH_3COOH - > 2CH_3COOK+ H_2O$
- $K + CH_3COOH - > CH_3COOK+ H_2O$
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Question 19 of 20

19. Question
Write the equation for the reaction between ethanoic acid and lithium carbonate.
- $Li_2CO_3 + 2CH_3COOH - > 2CH_3COOLi + H_2O + CO_2$
- $Li_2CO_3 + CH_3COOH - > (CH_3COO)_2Li + H_2O$
- $Li_2CO_3 + 2CH_3COOH - > 2CH_3COOLi + H_2O$
- $Li_2CO_3 + CH_3COOH - > 2CH_3COOLi + H_2 + CO_2$
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Question 20 of 20

20. Question
Write the equation for the reaction between ethanoic acid and calcium oxide.
- $CaO + CH_3COOH - > (CH_3COO)_2Ca + H_2O$
- $CaO + 2CH_3COOH - > 2(CH_3COO)2Ca + H_2O$
- $CaO + CH_3COOH - > CH_3COOCa + H_2O$
- $2CaO + CH_3COOH - > 2CH_3COOCa + H_2O$
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