Code Experiment II. Determination of the Citric Acid Contents in Fruit Juices (Cont’d) Questions Data and Answers (Points) (Show your working) n(NaOH) = V(NaOH) * c(NaOH) [1] Correct values for each juice [0.5] II-2 (2.0) Moles of NaOH Mandarin mol Apple mol (Show your working) Mole ratio: 3:1 Calculation n(acid) = n(NaOH) / 3 [0.5 per juice] Calculation m(acid) = n(acid) * Mr(acid) [0.5 per juice] 0.25 if error in Mr or missing units II-3 (2.0) Moles of citric Mandarin Apple acid Masses of citric Mandarin Apple acid
Code Experiment II. Determination of the Citric Acid Contents in Fruit Juices (Cont’d) Questions (Points) Data and Answers II-2 (2.0) (Show your working) n(NaOH) = V(NaOH) * c(NaOH) [1] Correct values for each juice [0.5] Moles of NaOH Mandarin mol Apple mol II-3 (2.0) (Show your working) Mole ratio: 3:1 Calculation n(acid) = n(NaOH) / 3 [0.5 per juice] Calculation m(acid) = n(acid) * Mr(acid) [0.5 per juice] 0.25 if error in Mr or missing units Moles of citric acid Mandarin Apple Masses of citric acid Mandarin Apple
Experiment_mark-scheme_chemistry(Final)_1710.docx