Which step(s) is/are NOT required in the practice of weighin…

Which step(s) is/are NOT required in the practice of weighing by difference? Weigh a capped bottle containing the dry reagent. Quickly pour some of the dry reagent from the weighing bottle into a receiver. Weigh the receiver containing the dry reagent. Recap the bottle that now contains less of the dry reagent. Reweigh the capped bottle that contains less of the dry reagent.

A pair of students standardize a sodium hydroxide solution u…

A pair of students standardize a sodium hydroxide solution using KHP and obtain the following concentrations: 0.102 8 M, 0.103 1 M, 0.120 0 M, 0.103 0 M, and 0.102 6 M. The students suspect that 0.120 0 M is an outlier. Is 0.120 0 M an outlier and what is the average concentration of the sodium hydroxide solution? Refer to Table 4-6 for critical values of G.