Some of the apparatus used by the student are drawn below. Name the three pieces of apparatus A, B and C.
Suggest why sulfuric acid is introduced into apparatus C.
State the colour change at the end-point, from [BLANK] to [BLANK].
Enter the values in the results table. Complete the results table.
Tick (✓) the best titration results in the table. Use the ticked values to find the average volume of $\text{KMnO}_4\text{(aq)}$ added in cm$^3$.
Calculate the number of moles of ethanedioic acid present in $25.0\ \text{cm}^3$ of the $\text{H}_2\text{C}_2\text{O}_4\text{(aq)}$. $[M_r:\ \text{H}_2\text{C}_2\text{O}_4,\ 90]$
The stoichiometric ratio shows that two moles of $\text{KMnO}_4$ react with five moles of $\text{H}_2\text{C}_2\text{O}_4$. Calculate the number of moles of $\text{KMnO}_4$ present in $24.55\ \text{cm}^3$ of the aqueous potassium manganate(VII).
Calculate the concentration, in $\text{mol dm}^{-3}$, of the $\text{KMnO}_4\text{(aq)}$.
Calculate the concentration, in $\text{g dm}^{-3}$, of the $\text{KMnO}_4\text{(aq)}$. Give your answer to three significant figures. $[M_r:\ \text{KMnO}_4,\ 158]$