Table 1: Titrations of sodium hydroxide versus standard hydrochloric acid solution (4 marks) Average volume of NaOH(aq) used (based on 3 closest results) =25.85mL RT 2 ANALYSIS OF THE UNKNOWN CARBONATE nown Code: F Table 2: Masses of unknown carbonate samples (3 marks) 2. Calculate the moles of HCl in 50.00mL of the standardized HCl (aq) solution. ( l mark) c=vnn=c.v50.00mL0.05)=(4)(0.05)=0.2mal/L From this point on, show detailed calculations for sample 1 only. Record the results for the other two trials in the spaces provided. 3. Calculate the moles of NaOH needed to titrate the excess HICl in each fask. (2 marks) CO32(aq)+2H+(aq2)CO2(g)+H2O(4) Titration 2: mol Titration 3: mol 4. Calculate the moles of HCl remaining in each flask after the reaction with the unknown carbonate. (2 marks) Titration 2: mol Titration 3: mol Calculate the moles of HCl used up by the reaction with the unknown carbonate. ( 2 marks) Titration 2: mol Titration 3: mol Calculate the moles of carbonate ion that reacted. ( 2 marks) Titration 2: mol Titration 3: mo