A 5.0 ml unknown sample was analyzed by the double indicator method. A single burette was used titration using phenolphthalein and methyl orange respectively and 0.5038 N HCI as the standard solution. Based on the data given: Initial reading of HCI 0.0 mL, Final reading of HCl in Mo is 16.30 mL, Vol. of HCl in Pp is 10.50 and in Mo is 5.80 mL (Answer using the letter of the choices) Identify the compound/s present in the unknown sample. (Choices: A. NaOH & Na2CO3 | B.Na2CO3 C. NaHCO3 | D. NAOH | E. NaHCO3 & Na2CO3 ) Find the weight in grams of the identified compound/s. (Choices: A. 0.0947| B. 0.3097|| C. 0.2730 | D. 0.2730 &0.3097 E. 0.0947 & 0.3097) Find the % composition of the identified compound/s. (Choices: A. 1.89 | B. 1.89 & 6.19 |C. 6.19 | D. 5.24 |E. 5.24 & 6.19)

A 5.0 ml unknown sample was analyzed by the double indicator method. A single burette was used titration using phenolphthalein and methyl orange respectively and 0.5038 N HCI as the standard solution. Based on the data given: Initial reading of HCI 0.0 mL, Final reading of HCl in Mo is 16.30 mL, Vol. of HCl in Pp is 10.50 and in Mo is 5.80 mL (Answer using the letter of the choices) Identify the compound/s present in the unknown sample. (Choices: A. NaOH & Na2CO3 | B.Na2CO3 C. NaHCO3 | D. NAOH | E. NaHCO3 & Na2CO3 ) Find the weight in grams of the identified compound/s. (Choices: A. 0.0947| B. 0.3097|| C. 0.2730 | D. 0.2730 &0.3097 E. 0.0947 & 0.3097) Find the % composition of the identified compound/s. (Choices: A. 1.89 | B. 1.89 & 6.19 |C. 6.19 | D. 5.24 |E. 5.24 & 6.19)

Chemical Principles in the Laboratory

11th Edition

ISBN:9781305264434

Author:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Publisher:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Chapter24: The Standardization Of A Basic Solution And The Determination Of The Molar Mass Of An Acid

Section: Chapter Questions

Problem 3ASA: A 0.3012g sample of an unknown monoprotic acid requires 24.13mL of 0.0944MNaOH for neutralization to...

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