Basic analytical chemistry - volumetry analysis 9. A suspension of milk of magnesia, Mg(OH)2, is analysed by a back-titration. A 1.0391 gsample is dissolved by the addition of 25.0 mL of 0.1112 M perchloric acid. The excessperchloric acid is titrated with 10.55 mL of 0.1417 M NaOH solution to reach aphenolphthalein end point.Mg(OH)2 + 2HC104 → Mg(Cl)4)2 + 2H₂OHCIO4 + NaOH →NaC104 + H₂01. What is the weight percentage of magnesium hydroxide in the sample?2. Sketch a labelled titration curve of a strong acid (50.0 mL 0.100 M) reacting witha strong base of similar concentration.10. A solution of HCI is standardized by titrating 0.1876 g Na2CO3. The titration required37.86 mL acid. Calculate the molarity of HCI.

In an acid-base reaction salt and water are formed.

9. A suspension of milk of magnesia, Mg(OH)2, is analysed by a back-titration. A 1.0391 g sample is dissolved by the addition of 25.0 mL of 0.1112 M perchloric acid. The excess perchloric acid is titrated with 10.55 mL of 0.1417 M NaOH solution to reach a phenolphthalein end point. Mg(OH)2 + 2HC104 → Mg(CI)4)2 + 2H₂O HCIO4 + NaOHNaC104 + H₂0 1. What is the weight percentage of magnesium hydroxide in the sample? 2. Sketch a labelled titration curve of a strong acid (50.0 mL 0.100 M) reacting with a strong base of similar concentration. 10. A solution of HCI is standardized by titrating 0.1876 g Na2CO3. The titration required 37.86 mL acid. Calculate the molarity of HCI.

9. A suspension of milk of magnesia, Mg(OH)2, is analysed by a back-titration. A 1.0391 g sample is dissolved by the addition of 25.0 mL of 0.1112 M perchloric acid. The excess perchloric acid is titrated with 10.55 mL of 0.1417 M NaOH solution to reach a phenolphthalein end point. Mg(OH)2 + 2HC104 → Mg(CI)4)2 + 2H₂O HCIO4 + NaOHNaC104 + H₂0 1. What is the weight percentage of magnesium hydroxide in the sample? 2. Sketch a labelled titration curve of a strong acid (50.0 mL 0.100 M) reacting with a strong base of similar concentration. 10. A solution of HCI is standardized by titrating 0.1876 g Na2CO3. The titration required 37.86 mL acid. Calculate the molarity of HCI.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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