Q.4 A solution of sodium hydroxide contained 0.250moldm3. Using phenolphthalein indicator, titration of 50.0cm3 of this solution required 40cm3 of a hydrochloric acid solution for complete neutralisation. (4 Marks) (a) Write the equation for the titration reaction. (b) What apparatus would you use to measure out the (i) sodium hydroxide solution and (ii) hydrochloric acid solution? (c) What would you use to rinse your apparatus out before doing the titration? (d) What is the indicator colour change at the end-point? Explain with the appropriate equation. (e) Calculate the moles of sodium hydroxide neutralised. (f) Calculate the moles of hydrochloric acid neutralised. (g) Calculate the concentration of the hydrochloric acid in mol/dm3 (molarity). (h) Will this titration generate the accurate result? If not, then which type of error will be present