91Ó°ÊÓ

How many milliliters of \(3.00 \mathrm{M} \mathrm{H}_{2} \mathrm{SO}_{4}\) are required to react with \(4.35 \mathrm{~g}\) of solid containing \(23.2 \mathrm{wt} \% \mathrm{Ba}\left(\mathrm{NO}_{3}\right)_{2}\) if the reaction is \(\mathrm{Ba}^{2+}+\mathrm{SO}_{4}^{2} \rightarrow \mathrm{BaSO}_{4}(s) ?\)

How many grams of \(0.491\) wt\% aqueous \(\mathrm{HF}\) are required to provide a \(50 \%\) excess to react with \(25.0 \mathrm{~mL}\) of \(0.0236 \mathrm{M} \mathrm{Th}^{4+}\) by the reaction \(\mathrm{Th}^{4+}+4 \mathrm{~F}^{-} \rightarrow \mathrm{ThF}_{4}(s)\) ?

Explain the following statement: "The validity of an analytical result ultimately depends on knowing the composition of some primary standard."

Distinguish between the terms end point and equivalence point.

How does a blank titration reduce titration error?

What is the difference between a direct titration and a back titration?

What is the difference between a reagent grade chemical and a primary standard?

Why are ultrapure acid solvents required to dissolve samples for trace analysis?

How many milliliters of \(0.100 \mathrm{M} \mathrm{KI}\) are needed to react with \(40.0 \mathrm{~mL}\) of \(0.0400 \mathrm{M} \mathrm{Hg}_{2}\left(\mathrm{NO}_{3}\right)_{2}\) if the reaction is \(\mathrm{Hg}_{2}^{2+}+2 \mathrm{I}^{-} \rightarrow\) \(\mathrm{Hg}_{2} \mathrm{I}_{2}(s) ?\)

For Reaction 1-7, how many milliliters of \(0.1650 \mathrm{M} \mathrm{KMnO}_{4}\) are needed to react with \(108.0 \mathrm{~mL}\) of \(0.1650 \mathrm{M}\) oxalic acid? How many milliliters of \(0.1650 \mathrm{M}\) oxalic acid are required to react with \(108.0 \mathrm{~mL}\) of \(0.1650 \mathrm{M} \mathrm{KMnO}_{4}\) ?