Calculate the mass of impure potassium iodate(V) used in the experiment.
Why does the beaker need to be washed out, with the rinsings poured into the same container as the solution?
Name the vessel used to prepare solution G.
Which liquid should rinse the pipette immediately before it is used to measure $25.0\,\text{cm}^3$ of G?
Why is it not necessary to measure exactly equal amounts of aqueous potassium iodide and dilute sulfuric acid in each titration?
Use the diagrams to fill in the table and work out the average volume of L.
Calculate the amount of substance of $\text{Na}_2\text{S}_2\text{O}_3$ in the average volume of L, $0.100\,\text{mol dm}^{-3}$ $\text{Na}_2\text{S}_2\text{O}_3$, used during the titration.
Use the equation to find the amount of substance of $\text{I}_2$ in H in the conical flask. $2\text{Na}_2\text{S}_2\text{O}_3 + \text{I}_2 \rightarrow 2\text{NaI} + \text{Na}_2\text{S}_4\text{O}_6$
Use the equation to find the amount of substance of $\text{KIO}_3$ that gives the amount of substance of $\text{I}_2$ calculated in (h). This is the amount of substance of $\text{KIO}_3$ in $25.0\,\text{cm}^3$ of G. $\text{KIO}_3 + 5\text{KI} + 3\text{H}_2\text{SO}_4 \rightarrow 3\text{I}_2 + 3\text{K}_2\text{SO}_4 + 3\text{H}_2\text{O}$
Calculate the amount of substance of $\text{KIO}_3$ in $500.0\,\text{cm}^3$ of G.
Calculate the $M_r$ of $\text{KIO}_3$. [$A_r$: K, 39; I, 127; O, 16]
Use your answers to (j) and (k) to find the mass of potassium iodate(V), $\text{KIO}_3$, in the sample of impure potassium iodate(V).
Use your answers to (a) and (l) to work out the percentage by mass of $\text{KIO}_3$ in the sample of impure potassium iodate(V).