Calculating Kc for an equilibrium reaction
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HCl |
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CH3COOH |
C2H5OH |
à |
CH3COOC2H5 |
H2O |
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Vol start (cm3) |
30 |
30 |
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30 |
10 |
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Mass start (g) |
31.5 |
23.7 |
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27.6 |
10.0 |
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Moles start |
0.525 |
0.515 |
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0.314 |
0.556 |
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Moles eqm |
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Moles reacted |
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Conc eqm |
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E) Easy bit – moles at the start
Calculation:
1. Use the densities from Activity 17 sheet to calculate the masses of the molecules at the start – fill in the table above.
Mass = Density x Volume
2. Use the Mr’s of the molecules to calculate the moles at the start – fill in the table above.