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5 (a) (i) Ethanoic acid, CH₃COOH, reacts with ethanol to form ethyl ethanoate and water - Edexcel - GCSE Chemistry - Question 5 - 2016 - Paper 1
Question 5
5 (a) (i) Ethanoic acid, CH₃COOH, reacts with ethanol to form ethyl ethanoate and water. Complete the equation for the reaction by adding the formula of ethyl ethano... show full transcript
Worked Solution & Example Answer:5 (a) (i) Ethanoic acid, CH₃COOH, reacts with ethanol to form ethyl ethanoate and water - Edexcel - GCSE Chemistry - Question 5 - 2016 - Paper 1
Step 1
Step 2
State what you would see if solid calcium carbonate is added to some dilute ethanoic acid.
Answer
When solid calcium carbonate (CaCO₃) is added to dilute ethanoic acid, effervescence occurs due to the release of carbon dioxide (CO₂) gas. The solid may also fizz and eventually dissolve as the reaction proceeds, indicating that a chemical reaction is taking place.
Step 3
Complete the sentence by putting a cross (X) in the box next to your answer.
Answer
To determine the concentration of ethanoic acid in mol dm⁻³, we can use the formula:
ext{Concentration (mol dm}^{-3} ext{)} = rac{ ext{Mass (g)}}{ ext{Relative Molecular Mass (g/mol)} imes ext{Volume (dm}^3 ext{)}}Substituting the values:
ext{Concentration} = rac{6.0 ext{ g}}{60 ext{ g/mol} imes 1.0 ext{ dm}^3} = 0.1 ext{ mol dm}^{-3}Therefore, the correct answer is A 0.1.