Conclusion

The conclusion should answer the aim, and should state the (numerical) results. Think of it as a spoiler for the whole lab report!

For example:

If the aim was: To perform an accurate dilution of a food dye stock solution using a burette and a 25.00 mL volumetric flask, and to assess the accuracy of the dilution using UV-visible spectrophotometry.

Then the conclusion could be: A green food dye stock solution (22.0 ppm) was diluted by a factor of 5 to produce a 4.40 ppm solution. The accuracy of the dilution was assessed using UV-visible spectrophotometry (at 630 nm) and the %error of the dilution was determined to be 4.5%.