Just D 3.(1) Record the student's readings and the titres in the table below.Calculate the mean titre, to the nearest 0.05cm³, that the student should use foranalysing the results.Titration 1Titration 2Titration 327.300145乙デつ0 2元7SFinal reading/cm3Initial reading/cm0.6026,40 26.5onearext o0S,2526.85Titre/cm2640 26Socm³ [4]mean titre =(ii) The uncertainty in each burette reading is ± 0.05 cm3.Calculate the percentage uncertainty for the titre in Titration 1.incertainty in burette reatly2x0.05 Y loos 0.3726,85percentage uncertainty =.DZソ% (1](i) The student realised that the solution of A had not been prepared correctly.How should the student have made up the solution?The studanduselans.ms of valumetesflastinteadofebeaken(1] (d) A student repeats the titration to determine the molar mass and structure of A.The student prepares a 250.0cm³ solution from 1.513g of A.The solution of A is added to the burette and titrated with 25.0 cm3 volumes of0.112 moldm-3 NaOH(aq).1 mol of A reacts with 2 mol of NaOH.The student obtains a mean titre of 27.30 cm³.(1) Calculate the molar mass of A from these results.Give your answer to the nearest whole number.Show your working.molar masof A =gmol' (4][AC 1.1]

It is given that 1.513 g of A is used to form a solution of 250 mL, and in the titration 27.3 mL of…

(d) A student repeats the titration to determine the molar mass and structure of A. The student prepares a 250.0cm solution from 1.513g of A. The solution of A is added to the burette and titrated with 25.0cm3 volumes of 0.112moldm NaOH(aq). 1 mol of A reacts with 2 mol of NaOH. The student obtains a mean titre of 27.30 cm3. () Calculate the molar mass of A from these results. Give your answer to the nearest whole number. Show your working.