Calculate the mass of $L$ that was used in the experiment.
How could the sand be taken out of the mixture?
What is the colour of the solution in the conical flask before $P$ has been added and after $P$ is just in excess?
Use the diagrams to fill in the table and calculate the mean volume of $P$ used.
Calculate the number of moles of potassium manganate(VII) in the mean volume of $P$.
Calculate the number of moles of $\text{Fe}^{2+}$ present in $25.0\,\text{cm}^3$ of $M$.
Calculate the number of moles of $\text{Fe}^{2+}$ present in $250\,\text{cm}^3$ of $M$.
Calculate the mass of iron in $250\,\text{cm}^3$ of $M$.
Calculate the percentage by mass of iron in $L$.
Calculate the percentage by mass of nitrogen in $(\text{NH}_4)_2\text{SO}_4$.
Name one other compound that can be used as a nitrogenous fertiliser.