Buret readings for Titration. 1t Titration A) B) Phenolphthalein endpoint lolad

Question

Buret readings for Titration. 1t Titration A) B) Phenolphthalein endpoint lolad C) Methyl Purple endpoint 2nd Titration Initial Volume Volume reading for "C" of first titration is volume reading for 'A" of second titration Volume of Titrant for Na.COs (Volune at B minus Volume at A) times 2 Volume of Titrant for NaHCOs Wolume at C minus Volume at A) minus Volume for Na-CO Titrant Volume for Na2CO3 Titrant Volume for NaHCOs Molarity for NaHCOa and Na CO Molarity of Na2CO3 Molarity of NaHCOs AVG AVG:M LM

Explanation / Answer

Titrant volume for Na2CO3 (1st titration) = (volB-volA)*2

= (3.101-0.11)*2= 2.991*2= 5.982mL

(2nd titration) = (12.13-8.52)*2 = 7.22mL

Titrant volume for NaHCO3 = (volC-volA)-vol of Na2CO3

Titration 1 : 8.52-0.11-5.982= 2.428mL

Titration 2: 17.21-8.52-7.22= 1.47mL

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