In the laboratory, a student was tasked to prepare a stock solution of HCl for titration. The available analytical grade HCl solution in the stock room was labelled 35% w/v HCl. The student proceeded to prepare the stock solution by mixing 10mL of the HCl solution with 490mL of analytical grade water. Then, the solution was further diluted by adding 5mL, since the total volume of the solution did not reach the 500mL etched mark on the volumetric flask. To prepare the titrant, the student mixed 10mL of the stock solution, then added 40mL of analytical grade water. The titrant was subsequently used to determine the concentration of two titrand. *Use the table as a reference 1. What is the normality of the available HCl reagent in the stock room?* 5.08 N 10.15 N 20.3 N 11.0 N None of the choices 2. What is the normality of the stock solution of HCl?* 0.09N 0.10N 0.11N 0.12N None of the choices 3. What is the normality of the titrant?* 0.20 N 0.21 N 0.02 N 0.12 N None of the choices 4. What is the approximate pH of the titrant (assume complete dissociation)?* 2.4 1.2 1.7 2.7 None of the choices
In the laboratory, a student was tasked to prepare a stock solution of HCl for titration. The available analytical grade HCl solution in the stock room was labelled 35% w/v HCl. The student proceeded to prepare the stock solution by mixing 10mL of the HCl solution with 490mL of analytical grade water. Then, the solution was further diluted by adding 5mL, since the total volume of the solution did not reach the 500mL etched mark on the volumetric flask. To prepare the titrant, the student mixed 10mL of the stock solution, then added 40mL of analytical grade water. The titrant was subsequently used to determine the concentration of two titrand. *Use the table as a reference 1. What is the normality of the available HCl reagent in the stock room?* 5.08 N 10.15 N 20.3 N 11.0 N None of the choices 2. What is the normality of the stock solution of HCl?* 0.09N 0.10N 0.11N 0.12N None of the choices 3. What is the normality of the titrant?* 0.20 N 0.21 N 0.02 N 0.12 N None of the choices 4. What is the approximate pH of the titrant (assume complete dissociation)?* 2.4 1.2 1.7 2.7 None of the choices
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter16: Reactions Between Acids And Bases
Section: Chapter Questions
Problem 16.102QE
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Question
In the laboratory, a student was tasked to prepare a stock solution of HCl for titration. The available analytical grade HCl solution in the stock room was labelled 35% w/v HCl. The student proceeded to prepare the stock solution by mixing 10mL of the HCl solution with 490mL of analytical grade water. Then, the solution was further diluted by adding 5mL, since the total volume of the solution did not reach the 500mL etched mark on the volumetric flask. To prepare the titrant, the student mixed 10mL of the stock solution, then added 40mL of analytical grade water. The titrant was subsequently used to determine the concentration of two titrand.
*Use the table as a reference
1. What is the normality of the available HCl reagent in the stock room?*
5.08 N
10.15 N
20.3 N
11.0 N
None of the choices
2. What is the normality of the stock solution of HCl?*
0.09N
0.10N
0.11N
0.12N
None of the choices
3. What is the normality of the titrant?*
0.20 N
0.21 N
0.02 N
0.12 N
None of the choices
4. What is the approximate pH of the titrant (assume complete dissociation)?*
2.4
1.2
1.7
2.7
None of the choices
Transcribed Image Text:Volume of titrant used to titrate 10mL Ca(OH)2 solution
16.80mL
Volume of titrant used to fitrate 10mL of NaOH solution
24.50mL
Here are pertinent details that the student collected prior to analysis
Density of stock solution
1.18 g/mL
Molar mass of HCI
36.458 g/mol
Density of water at 22°C
0.998 g/mL
Density of Calcium hydroxide
2.21 g/mL
Kb of Calcium hydroxide
3.74 x 10-³
Kb of sodium hydroxide
6.3 x 10-¹
NOTE: Use the values in the options in each item to answer the next item.
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