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PRE LAB : Volumetric Titrations. (Acid-Base Titrations) Name: ID Date 1. How many mL of a...
9. Acid-Base Titrations Acid-Base titrations are performed to determine the concentration of an acid or base...
9. Acid-Base Titrations Acid-Base titrations are performed to determine the concentration of an acid or base in a solution When the number of moles of in an acid is equal to the moles of in the base, water is formed and no acid or base is left unreacted. The solution has a pH of 7 and is called neutral. In an acid-base titration we use this concept to find out the concentration of an acid by adding base until all...
A student weighs a sample of potassium hydrogen phthalate (KHP) to prepare a primary standard for...
A student weighs a sample of potassium hydrogen phthalate (KHP) to prepare a primary standard for a titration. She later discovers that the KHP was contaminated with sugar. To determine the amount of KHP in the mixture, she takes 5.942 g of the mixture and make a 100.0 mL solution. The student then titrates 10.00 mL of this solution with a 0.1491 M sodium hydroxide solution. She finds that 13.12 mL of the NaOH solution is needed to reach the...
Acid / Base Titrations: Pre-Laboratory Assignment 1. Give at least two characteristics desirable in a primary...
Acid / Base Titrations: Pre-Laboratory Assignment 1. Give at least two characteristics desirable in a primary standard. 2. Define equivalence point and ritration and point. Do these two points in a titration occur when the same volume of titrant has been added? Explain 3. A student standardized a NaOH solution using KHC.H.O.. Three different KHC&H.O. samples were dissolved in water and titrated with the same NaOH solution, each to a phenolphthalein end point. The pertinent reaction is: KHC H404 aq)...
Acid / Base Titrations: Pre-Laboratory Assignment 1. Give at least two characteristics desirable in a primary...
Acid / Base Titrations: Pre-Laboratory Assignment 1. Give at least two characteristics desirable in a primary standard. 2. Define equivalence point and bitration end point. Do these two points in a titration occur when the same volume of titrant has been added? Explain. 3. A student standardized a NaOH solution using KHC.H.O.. Three different KHC.H.O. samples were dissolved in water and titrated with the same NaOH solution, each to a phenolphthalein end point. The pertinent reaction is: KHC3H404(aq) + NaOH(...
99 Chemistry I Laboratory Manual, 2017 Revision Acid/Base Titrations Pre-Lab Name: Date: 1) What is the...
99 Chemistry I Laboratory Manual, 2017 Revision Acid/Base Titrations Pre-Lab Name: Date: 1) What is the molar mass of KHP? 2) If a student weighs out 0.500 g of KHP and titrates it with sodium hydroxide solution, what is the molarity of the sodium hydroxide solution if it takes 31.21 mL of it to titrate the KHP? 3) It takes 26.61 mL of 0.228 M sodium hydroxide solution to titrate 10.00 mL of sulfuric acid solution. What is the molarity...
Standardization of NaOH: Acid Base Titration Objective: In this lab, you will accurately determine the concentration...
Standardization of NaOH: Acid Base Titration Objective: In this lab, you will accurately determine the concentration of a solution of sodium hydroxide (NaOH) using a 0.500M potassium hydrogen phthalate (KHP) standard solution. Background: Acid–Base Titrations When an acid reacts with a base, a neutralization reaction occurs. The H+ ions from the acid and the HO– ions from the base combine to form water and are therefore neutralized. The other product of reaction is a salt. For example, hydrochloric acid reacts...
3. 0.7253 g sample containing an unknown weak acid HA was dissolved in 50 mL water...
3. 0.7253 g sample containing an unknown weak acid HA was dissolved in 50 mL water and titrated against 0.1555 M NaOH, requiring 48.11 mL to of NaOH to reach the end-point. During the titration reaction, the pH of the solution is 3.77 when half of the HA is neutralized and the equivalence-point pH is 8.33. (a) State two ways to standardize the NaOH used in the titration. (b) Suggest and explain an indicator that can be used in the...
LAB 11 VOLUMETRIC ANALYSIS. THE TITRATION OF ACIDS AND BASES 167 Name Falak Sher Roll No....
LAB 11 VOLUMETRIC ANALYSIS. THE TITRATION OF ACIDS AND BASES 167 Name Falak Sher Roll No. 24 Date 1111719 Lab Partner VOLUMETRIC ANALYSIS PRE-LABORATORY ASSIGNMENT 1. a) Define molarity. b) What is the molarity of a solution 500 mL of which contains 0.500 moles of HCI? 2. 80.0 g of NaOH is dissolved to make 5.00 Liters of solution. What is the concentration of this solution in moles/Liter (i.e., its Molarity)? 3. 24.60 mL of 0.185 M HNO, are titrated...
Equivalence Point for Titration #1: 24.96 mL Equivalence Point for Titration #2: 25.40 mL Equivalence Point...
Equivalence Point for Titration #1: 24.96
mL
Equivalence Point for Titration #2: 25.40
mL
Equivalence Point for Titration #3: 25.20
mL
Midpoint pH for Titration #3: 9.80
QUESTIONS:
4) Set up the calculation required to determine
the concentration of the NaOH solution via titration of a given
amount of KHP. Include all numbers except the given mass of
KHP.
5) Set up the calculation required to determine
the concentration of the unknown strong acid via titration with a
known volume...
Weak-Acid Strong-Base Titrations. These next questions relate to a 25 mL aliquot of 0.35 M acetic acid (Ka = 1.77 x...
Weak-Acid Strong-Base Titrations. These next questions relate to a 25 mL aliquot of 0.35 M acetic acid (Ka = 1.77 x 10) that is titrated with 0.20 M potassium hydroxide (KOH). (f) What is the pH of the acetic acid solution before the titration begins? (g) What is the pH after 14 mL of 0.20 M KOH has been added to the solution? Use the Henderson-Hasselbalch equation. (h) What is the pH at the equivalence point?
9. Acid-Base Titrations Acid-Base titrations are performed to determine the concentration of an acid or base in a solution When the number of moles of in an acid is equal to the moles of in the base, water is formed and no acid or base is left unreacted. The solution has a pH of 7 and is called neutral. In an acid-base titration we use this concept to find out the concentration of an acid by adding base until all...
A student weighs a sample of potassium hydrogen phthalate (KHP) to prepare a primary standard for a titration. She later discovers that the KHP was contaminated with sugar. To determine the amount of KHP in the mixture, she takes 5.942 g of the mixture and make a 100.0 mL solution. The student then titrates 10.00 mL of this solution with a 0.1491 M sodium hydroxide solution. She finds that 13.12 mL of the NaOH solution is needed to reach the...
Acid / Base Titrations: Pre-Laboratory Assignment 1. Give at least two characteristics desirable in a primary standard. 2. Define equivalence point and ritration and point. Do these two points in a titration occur when the same volume of titrant has been added? Explain 3. A student standardized a NaOH solution using KHC.H.O.. Three different KHC&H.O. samples were dissolved in water and titrated with the same NaOH solution, each to a phenolphthalein end point. The pertinent reaction is: KHC H404 aq)...
Acid / Base Titrations: Pre-Laboratory Assignment 1. Give at least two characteristics desirable in a primary standard. 2. Define equivalence point and bitration end point. Do these two points in a titration occur when the same volume of titrant has been added? Explain. 3. A student standardized a NaOH solution using KHC.H.O.. Three different KHC.H.O. samples were dissolved in water and titrated with the same NaOH solution, each to a phenolphthalein end point. The pertinent reaction is: KHC3H404(aq) + NaOH(...
99 Chemistry I Laboratory Manual, 2017 Revision Acid/Base Titrations Pre-Lab Name: Date: 1) What is the molar mass of KHP? 2) If a student weighs out 0.500 g of KHP and titrates it with sodium hydroxide solution, what is the molarity of the sodium hydroxide solution if it takes 31.21 mL of it to titrate the KHP? 3) It takes 26.61 mL of 0.228 M sodium hydroxide solution to titrate 10.00 mL of sulfuric acid solution. What is the molarity...
LAB 11 VOLUMETRIC ANALYSIS. THE TITRATION OF ACIDS AND BASES 167 Name Falak Sher Roll No. 24 Date 1111719 Lab Partner VOLUMETRIC ANALYSIS PRE-LABORATORY ASSIGNMENT 1. a) Define molarity. b) What is the molarity of a solution 500 mL of which contains 0.500 moles of HCI? 2. 80.0 g of NaOH is dissolved to make 5.00 Liters of solution. What is the concentration of this solution in moles/Liter (i.e., its Molarity)? 3. 24.60 mL of 0.185 M HNO, are titrated...
Equivalence Point for Titration #1: 24.96
mL
Equivalence Point for Titration #2: 25.40
mL
Equivalence Point for Titration #3: 25.20
mL
Midpoint pH for Titration #3: 9.80
QUESTIONS:
4) Set up the calculation required to determine
the concentration of the NaOH solution via titration of a given
amount of KHP. Include all numbers except the given mass of
KHP.
5) Set up the calculation required to determine
the concentration of the unknown strong acid via titration with a
known volume...
Weak-Acid Strong-Base Titrations. These next questions relate to a 25 mL aliquot of 0.35 M acetic acid (Ka = 1.77 x 10) that is titrated with 0.20 M potassium hydroxide (KOH). (f) What is the pH of the acetic acid solution before the titration begins? (g) What is the pH after 14 mL of 0.20 M KOH has been added to the solution? Use the Henderson-Hasselbalch equation. (h) What is the pH at the equivalence point?
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