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If 10.0 ml of an unknown sample of phosphoric acid was titrated against 0.1 M standard solution of NaOH using Bromo cresol as an indicator, and 15.0 ml of NaOH was required, caleulate the concentration of H, PO, in (g/L) 1. O 29.4 g/L 2. 0 7.35 g/L 3. O 14.7 g/L 4. O 1.5 g/L 5. O Non of the above

If 10.0 ml of an unknown sample of phosphoric acid was titrated against 0.1 M standard solution of NaOH using Bromo cresol as an indicator, and 15.0 ml of NaOH was required, caleulate the concentration of H, PO, in (g/L) 1. O 29.4 g/L 2. 0 7.35 g/L 3. O 14.7 g/L 4. O 1.5 g/L 5. O Non of the above

Principles of Instrumental Analysis
Principles of Instrumental Analysis
7th Edition
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
ChapterA1: Evaluation Of Analytical Data
Section: Chapter Questions
Problem A1.5QAP
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Question 1/ 10 If 10.0 ml of an unknown sample of phosphoric acid was titrated against 0.1 M standard solution of NaOH using Bromo cresol as an indicator, and 15.0 ml of NaOH was required, caleulate the concentration of H, PO, in (g/L) 1. O 29.4 g/L 2. 0 7.35 g/L 3. O 14.7 g/L 4. O 1.5 g/L 5. O Non of the above
Transcribed Image Text:Question 1/ 10 If 10.0 ml of an unknown sample of phosphoric acid was titrated against 0.1 M standard solution of NaOH using Bromo cresol as an indicator, and 15.0 ml of NaOH was required, caleulate the concentration of H, PO, in (g/L) 1. O 29.4 g/L 2. 0 7.35 g/L 3. O 14.7 g/L 4. O 1.5 g/L 5. O Non of the above
Question 3/10 If a student computes the standard deviation that was due to the analysis error from a homogenous sample and it was 0.04, and that comes from a heterogeneous sample was 0.05. the the standard deviation due to sampling error (Ss) is: 1. O 0.045 2. O 0.072 3. O 0.010 4. O 0.030 5. O 0.411
Transcribed Image Text:Question 3/10 If a student computes the standard deviation that was due to the analysis error from a homogenous sample and it was 0.04, and that comes from a heterogeneous sample was 0.05. the the standard deviation due to sampling error (Ss) is: 1. O 0.045 2. O 0.072 3. O 0.010 4. O 0.030 5. O 0.411
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