Determination of Kc (AQA A-Level Chemistry): Flashcards

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Determination of Kc
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Initial moles of ethanoic acid & ethanol used

0.10.1 mol each

Catalyst for esterification reaction

Concentrated H2SO4H_2SO_4 (1 drop)

Concentration of NaOHNaOH for titration

1.01.0 mol dm−3^{-3}

Indicator used in KcK_c determination

Phenolphthalein

Time for equilibrium to establish

At least one week

Volume of NaOHNaOH neutralising acid at equilibrium

31.031.0 cm3^3

Moles of ethanoic acid remaining at equilibrium

0.00310.0031 mol

Moles of ethanoic acid reacted

0.0690.069 mol

KcK_c value for esterification reaction

5.05.0

Phenolphthalein colour change (acid to base)

Colourless to pink

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