[Qoo]

In an experiment we had 8 different bottles
     HCL           Water            C₃H₈O₂      C₂H₄O₂        C₂H₆O
     (ml)             (ml)                (ml)          (ml)           (ml)
1     5                 0                    5              0              0
2     5                 0                    0              1              4
3     5                 0                    0              2              3
4     5                 0                    0              3              2
5     5                 0                    4              0              1
6     5                 0                    4              1              0
7     5                 1                    4              0              0
8     5                 2                    3              0              0
Those are the solution in each bottle and we titrated them with NaOH (1.0 mol dm^-3)

The amount of NaOH added to each bottle
1  46.4ml
2  17.7ml
3  18.8ml
4  12.8ml
5  33.7ml
6  41ml
7  31.3ml
8  30ml

We only know that HCL's concentration is (3.0 mol dm^-3)
and the density of the solution C₃H₈O₂ O.897g/ml
C₂H₄O₂ 1.049g/ml
C₂H₆O 0.789g/ml

how can I calculate the Kc for each bottle?

[Fluoroantimonicacid]

You should not be used HCl, it affects the ionization of acids.

[DevaDevil]

for each of the bottles, can you write down the reaction equations? From there you can formulate Kc for each bottle in terms of concentrations.

you have the densities of the separate compounds and their molar mass, which will allow you to calculate the amount of moles of each compound in each bottle.
The amount of NaOH used will tell you how much of the HCl was not used in the initial mixing in the bottles