Calculate the mass of M that was used in the experiment.
Name the apparatus in which solution Q should be made up to $250\,\text{cm}^3$.
What is the colour of the solution in the conical flask before hydrochloric acid is added, and what colour is seen at the end-point?
Use the diagrams to fill in the titration table and work out the average volume of hydrochloric acid needed.
Calculate the number of moles of hydrochloric acid in the average volume of $0.100\,\text{mol dm}^{-3}$ hydrochloric acid in (d).
Construct the equation for the reaction of sodium carbonate, $\text{Na}_2\text{CO}_3$, with hydrochloric acid.
Using the information in (f) together with your answer to (e), determine the number of moles of sodium carbonate in $25.0\,\text{cm}^3$ of Q.
Calculate the number of moles of sodium carbonate in $250\,\text{cm}^3$ of Q.
Use your answer to (h) to work out the mass of sodium carbonate, $\text{Na}_2\text{CO}_3$, in the sample of M. [$A_r$: Na, $23$; C, $12$; O, $16$]
Using your answers to (i) and (a), work out the mass of sodium chloride in the sample of M.
Calculate the percentage by mass of sodium chloride present in M.