(37. During a practical lesson, solution X was prepared by dissolving Y gofa of sodium carbonate and sodium hydrogen carbonate in enough distille and made up 500 ml of solution. About 25 cm³ of the solution mixture w with hydrochloric acid of molarity 0.1M, first using phenolphthalein follo 38 screened methyl orange as indicators. Was (i) The first step of the titration using phenolphthalein indicator require cm³ of the acid for the pink colour to be discharged and the equation for reaction is: Na₂CO, (aq) + HCl (aq) - NaCl(aq) +NaHCO
(ii)The second step of the titration using screened methyl orange indica required 45 cm³ of the acid for the colour to turn from yellow to red (endpoint). The following is the equation for the reaction: NaHCO3(aq) + HCl(aq) - CO2(g) + NaCl (aq) +H₂O(l)
calculate I:
(i) Moles of sodium carbonate in the mixture.
(ii) Mass of the sodium carbonate in the sample mixture.
Calculate II:
(i) Moles of sodium hydrogen carbonate in the sample.
(ii) Mass of sodium hydrogen carbonate in the sample.
(b) Mass of sample Y of the mixture.
(c) Determine the molarity of:
(i) Sodium carbonate.
(ii) Sodium hydrogen carbonate ​