New answers tagged

0

No, you cannot determine precisely with the data you collected (for example, a pH value 'around 14'). Some of the generated carbon dioxide gas also may have escaped or not reacted with the high pH solution. Remember, pH is a log scale and lose of precision can be significant. However, you may argue, within the measurement error of the pH scale, you are ...


4

common convention is to report the uncertainty of an analogue instrument as plus or minus half of the smallest scale division Yes, this is merely a poor convention propagated by general chemistry texts. Actually, this does not reflect analytical measurement standard deviation, and this is not the way volume uncertainty should be expressed. The correct ...


7

It is the inside of a centrifuge where the rotor gets attached (the top spins, and the two pins ensure proper seat of the rotor on the conical piece). Here is a better picture of the inside of a Sorvall RC-5C Plus Floor Centrifuge, with the hands serving as scale bar. This is partially disassembled to show how one would change the motor brushing. Screenshot ...


0

Chloroform is used as an emulsion stabilizer. The calico strainer is used as it is less prone to clogging than a buchner funnel. The mix will clog frits and normal filter paper.


Top 50 recent answers are included