Originally Posted by Pathos
I did a lab experiment in class a couple of weeks ago. We had to use calcium chloride and sodium carbonate to create chalk. The materials used were:
- three 250 mL beakers
beakers are a pretty imprecise method of measuring volume. A graduated cylinder is much more precise. I don't think this is a measurement error, b/c its a result of the device, not (for example) human error in misreading the numbers on the beaker.
- filter paper
Whenever you filter stuff out, some of the precipitate inevitably gets stuck on the filter paper. Possible error?
edit: you already listed this. woops.
Comments are underlined. Otherwise, you might consider the effects of limiting reagents, and whether you would receive optimal yield from the reaction, especially if you've only measured to 2 sig figs on each.