1. What is the molecular formula for KHP? (KHP is an acronym.) Does KHP act as...
1. What is the molecular formula for KHP? (KHP is an acronym.) Does KHP act as an acid or as a base in our titration? Does KHP go in the buret or in the flask?
2. What is the name of the chemical that will react with KHP? Does it go in the buret or in the flask?
3. a. What does an indicator do? How? b. What is our indicator's chemical name?
4. BRIEFLY: a. What is the equivalence point of a titration? b. How is the endpoint different from the equivalence point?
Homework Answers
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1. What is the molecular formula for KHP? (KHP is an acronym.)
Does KHP act as...
2-9 2. When performing a titration, what is the difference between "buret reading and "volume used?...
2-9
2. When performing a titration, what is the difference between "buret reading and "volume used? 3. KHP is an acronym for what reagent? What is the molar mass of KHP? Forty milliliters of 0.10 M HCl is diluted to the mark in a 100 mL volumetric flask. What is the new molarity of the HCl solution? 5. How many moles are in 0.385 g of KHP? 6. Explain how to "season" a pipet or buret. 7. Hydrochloric acid is...
grams of KHP 0.6413 mL NaOH needed to titrate KhP to endpoint 38.80 Grams of unknown...
grams of KHP 0.6413
mL NaOH needed to titrate KhP to endpoint 38.80
Grams of unknown acid: 1.5106
mL NaOH needed to titrate unknown acid to endpoint
33.55
need to know molarity of NaOH solution and Molar mass of
unknown acid. Please help and show work!
CHEM 265 LAB EXPERIMENT NUMBER 4 DETERMINATION OF THE MW OF AN UNKNOWN ACID This experiment utilizes a titration to determine the molecular weight of an unknown acid. In this experiment, the endpoint of...
PRE-LAB or POST-LAB QUIZ Name Instructor/Section PRE-LAB or POST-LAB QUIZ Multiple choice questions. Circle your answers....
PRE-LAB or POST-LAB QUIZ Name Instructor/Section PRE-LAB or POST-LAB QUIZ Multiple choice questions. Circle your answers. I. The process of carrying out an analysis where a measured volume of a chemical hav- ing an UNKNOWN concentration is reacted with a measured volume of a chemical having a KNOWN concentration is called a. the neutralization point. b. the equivalence point. c. the end point. d. a titration. 2. In volumetric analysis, the point at which the indicator changes color is called...
Materials: NaOH MW = 40 g/mL, KHP - potassium hydrogen phthalate, KHC8H404, MW = 204.23 g/mol....
Materials: NaOH MW = 40 g/mL, KHP - potassium hydrogen phthalate, KHC8H404, MW = 204.23 g/mol. Acetic acid, HC2H302, MW = 60.05 g/mol Part 1: Standardization of NaOH Assume 0.951 g of KHP is weighed and transferred to a 250 mL Erlenmeyer flask. Approximately 50 ml water is added to dissolve the KHP. Note that the exact volume of water is not important because you only need to know the exact number of moles of KHP that will react with...
step 2) trial #1 mass of solid standard (KHP, potassium hydrogen phthalate) used = 0.100g; trial...
step 2) trial #1 mass of solid standard (KHP, potassium hydrogen phthalate) used = 0.100g; trial 1 equivalence point = 35.32 mL step 5) mass of unknown (mixture of KHP and NaOH) = 1.5389g; trial #1 equivalence point = 10.50 mL find requested weight percent What happens in step 2) Use a convenient size flask and prepare an aqueous solution containing a known mass of KHP that will react with an estimated 25 mL of the unstandardized NaOH solution. (the...
Materials: NaOH MW = 40 g/mL, KHP - potassium hydrogen phthalate, KHC8H404, MW = 204.23 g/mol....
Materials: NaOH MW = 40 g/mL, KHP - potassium hydrogen phthalate, KHC8H404, MW = 204.23 g/mol. Acetic acid, HC2H302, MW = 60.05 g/mol Part 1: Standardization of NaOH Assume 0.951 g of KHP is weighed and transferred to a 250 mL Erlenmeyer flask. Approximately 50 ml water is added to dissolve the KHP. Note that the exact volume of water is not important because you only need to know the exact number of moles of KHP that will react with...
Questions 1). HCl is described as being a MONOPROTIC acid. What does that mean? 2) If...
Questions 1). HCl is described as being a MONOPROTIC acid. What does that mean? 2) If a group forgot to add the phenolphthalein, how would they know when the acid was neutralized? 3) Explain the difference between the terms endpoint and equivalence point? Endpoint is the point at which the indicator changes its colour, on the other hand equivalence point is the point at which n 4) If we placed the Erlenmeyer flask over a Bunsen bumer and evaporated the...
ACID-BASE TITRATION 4) What is the purpose of the indicator? 5) Does the indicator participate in...
ACID-BASE TITRATION 4) What is the purpose of the indicator? 5) Does the indicator participate in the reaction with the acid and base? 6) Define endpoint. Define equivalence point. Calculate the volume in mL of 0.100M NaOH required to neutralize 2.50mL of 0.150M HC2H302 HC2H302(aq) + NaOH(aq) + NaC2H2O2(aq) + H2O(1)
A solution of which compound will be in the buret during your experiment? NaOH HCl HOAc...
A solution of which compound will be in the buret during your experiment? NaOH HCl HOAc EtOAc EtOH You will use titration to determine the equilibrium concentration of one component of this chemical reaction. Which component will you be determining the concentration of? HOAc (acetic acid) H2O (water) EtOAc (ethyl acetate) EtOH (ethyl alcohol) HCl (hydrochloric acid) Recall how titration works. If 17.51mL of 0.0985M NaOH is need to achieve the endpoint of a titration with KHP (potassium hydrogen phthalate), how many...
It's a weak acid strong base titration Experiment 4: Identification of an unknown acid by titration...
It's a weak acid strong base titration
Experiment 4: Identification of an unknown acid by titration Page 2 of 15 Background In this experiment, you will use both qualitative and quantitative properties to determine an unknown acid's identity and concentration. To do this analysis, you will perform a titration of your unknown acid sample-specifically a potentiometric titration where you use a pH meter and record pH values during the titration, combined with a visual titration using a color indi- cator...
2-9
2. When performing a titration, what is the difference between "buret reading and "volume used? 3. KHP is an acronym for what reagent? What is the molar mass of KHP? Forty milliliters of 0.10 M HCl is diluted to the mark in a 100 mL volumetric flask. What is the new molarity of the HCl solution? 5. How many moles are in 0.385 g of KHP? 6. Explain how to "season" a pipet or buret. 7. Hydrochloric acid is...
grams of KHP 0.6413
mL NaOH needed to titrate KhP to endpoint 38.80
Grams of unknown acid: 1.5106
mL NaOH needed to titrate unknown acid to endpoint
33.55
need to know molarity of NaOH solution and Molar mass of
unknown acid. Please help and show work!
CHEM 265 LAB EXPERIMENT NUMBER 4 DETERMINATION OF THE MW OF AN UNKNOWN ACID This experiment utilizes a titration to determine the molecular weight of an unknown acid. In this experiment, the endpoint of...
PRE-LAB or POST-LAB QUIZ Name Instructor/Section PRE-LAB or POST-LAB QUIZ Multiple choice questions. Circle your answers. I. The process of carrying out an analysis where a measured volume of a chemical hav- ing an UNKNOWN concentration is reacted with a measured volume of a chemical having a KNOWN concentration is called a. the neutralization point. b. the equivalence point. c. the end point. d. a titration. 2. In volumetric analysis, the point at which the indicator changes color is called...
Materials: NaOH MW = 40 g/mL, KHP - potassium hydrogen phthalate, KHC8H404, MW = 204.23 g/mol. Acetic acid, HC2H302, MW = 60.05 g/mol Part 1: Standardization of NaOH Assume 0.951 g of KHP is weighed and transferred to a 250 mL Erlenmeyer flask. Approximately 50 ml water is added to dissolve the KHP. Note that the exact volume of water is not important because you only need to know the exact number of moles of KHP that will react with...
Materials: NaOH MW = 40 g/mL, KHP - potassium hydrogen phthalate, KHC8H404, MW = 204.23 g/mol. Acetic acid, HC2H302, MW = 60.05 g/mol Part 1: Standardization of NaOH Assume 0.951 g of KHP is weighed and transferred to a 250 mL Erlenmeyer flask. Approximately 50 ml water is added to dissolve the KHP. Note that the exact volume of water is not important because you only need to know the exact number of moles of KHP that will react with...
Questions 1). HCl is described as being a MONOPROTIC acid. What does that mean? 2) If a group forgot to add the phenolphthalein, how would they know when the acid was neutralized? 3) Explain the difference between the terms endpoint and equivalence point? Endpoint is the point at which the indicator changes its colour, on the other hand equivalence point is the point at which n 4) If we placed the Erlenmeyer flask over a Bunsen bumer and evaporated the...
ACID-BASE TITRATION 4) What is the purpose of the indicator? 5) Does the indicator participate in the reaction with the acid and base? 6) Define endpoint. Define equivalence point. Calculate the volume in mL of 0.100M NaOH required to neutralize 2.50mL of 0.150M HC2H302 HC2H302(aq) + NaOH(aq) + NaC2H2O2(aq) + H2O(1)
It's a weak acid strong base titration
Experiment 4: Identification of an unknown acid by titration Page 2 of 15 Background In this experiment, you will use both qualitative and quantitative properties to determine an unknown acid's identity and concentration. To do this analysis, you will perform a titration of your unknown acid sample-specifically a potentiometric titration where you use a pH meter and record pH values during the titration, combined with a visual titration using a color indi- cator...
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