An alcohol, ROH, reacts reversibly with ethanoic acid to produce an ester. $$\[ \mathrm{ROH}(\mathrm{I})+\mathrm{CH}_{3} \mathrm{COOH}(\mathrm{I}) \rightleftharpoons \mathrm{CH}_{3} \mathrm{COOR}(\mathrm{I})+\mathrm{H}_{2} \mathrm{O}(\mathrm{I}) \]$$ 3.0 mol of $$$\mathrm{ROH}, 2.0 \mathrm{~mol}$$$ of ethanoic acid and 1.0 mol of water are mixed together. At equilibrium, 1.5 mol of $$$\mathrm{CH}_{3} \mathrm{COOR}$$$ is present. What is the value of the equilibrium constant, $$$K_{\mathrm{c}}$$$, for this reaction?

0.20

0.25

2.00

5.00

Chemistry

IGCSE&ALevel

CAIE

Exam No：9701_s24_qp_11 Year：2024 Question No：13

Answer:

Knowledge points:

1.2.1 define the term isotope in terms of numbers of protons and neutrons

1.2.2 understand the notation for isotopes, where is the mass or nucleon number and is the atomic or proton number

1.2.3 state that and explain why isotopes of the same element have the same chemical properties state that and explain why isotopes of the same element have different physical properties, limited to mass and density

Answer:

Knowledge points:

Solution:

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