A glass electrode is calibrated using two standards and the voltage of the electrode in each...
A glass electrode is calibrated using two standards and the voltage of the electrode in each standard was measured. The voltage of an unknown solution was also measured. All measurements were conducted at 20o C. Using the data calculate the value of β for this electrode and give your answer rounded to two decimal places. Sample Name pH Value (unitless) Voltage (mV) Standard 1 1.672 + 300.0 Standard 2 6.940 + 17.7 Unknown + 140.
Homework Answers
Add Answer to:
A glass electrode is calibrated using two standards and the
voltage of the electrode in each...
A glass electrode is calibrated using two standards and the voltage of the electrode in each...
A glass electrode is calibrated using two standards and the voltage of the electrode in each standard was measured. The voltage of an unknown solution was also measured. All measurements were conducted at 20° C. What is the theoretical slope of the electrode in mV/ pH unit at 20°C and give your answer rounded to two decimal places. Sample Nane pH Value (unitless) Voltage (mv) Standard 1 1.672 + 300.0 Standard 2 6.940 + 17.7 Unknown + 140.0
Calibration of a glass electrode gave a reading of 134.9 mV with a 0.05 m potassium...
Calibration of a glass electrode gave a reading of 134.9 mV with a 0.05 m potassium hydrogen phthalate buffer standard (pH = 4.015), and a reading of -163.2 mV with a 0.01 m borax buffer standard (pH = 9.139), both measured at 30°C. What is the observed slope (mV/PH unit) of the calibration curve? slope observed = mV/PH What is the theoretical slope at 30°C? slope theoretical = mV/pH What is B, the electromotive efficiency, to three significant figures? B...
1A. A voltage of 2.35 V was measured using a Ag/AgCl reference electrode with saturated KCl....
1A. A voltage of 2.35 V was measured using a Ag/AgCl reference electrode with saturated KCl. What would this potential be if it were measured using a standard hydrogen electrode? 1B. What would the potential be if it were measured using a saturated calomel electrode? 2. At 25o C for an "ideal" pH electrode, what is the change in voltage between a pH 2.00 solution and a pH 7.00 solution? Place your answer in units of mV.
Valley Hospital began using standards to evaluate its Admissions Department. The standard was broken into two...
Valley Hospital began using standards to evaluate its Admissions Department. The standard was broken into two types of admissions as follows: Type of Admission Standard Time to Complete Admission Record 30 min. 15 min. Unscheduled Scheduled The unscheduled admission took longer because name, address, and insurance information needed to be determined and verified at the time of admission. Information was collected on scheduled admissions prior to admitting the patient, thus requiring less time in admissions. The Admissions Department employs four...
Partner's Name Instructor Procedure I, Voltaic Cell Zn/Zn2+ 1.0 M || Cu2+ 1.0 M/Cu In the...
Partner's Name Instructor Procedure I, Voltaic Cell Zn/Zn2+ 1.0 M || Cu2+ 1.0 M/Cu In the space below write the equations for the two half reactions and sum them appropriately to calculate the standard reaction potential for a 1.0 M voltaic cell. Show the overall net ionic equation for this reaction. 9pts.) Standard reaction potential Write the expression for Q for this redox reaction. (4 pes) In the space below show a calculation using the Nemst equation to determine the...
Valley Hospital began using standards to evaluate its Admissions Department. The standard was broken into two...
Valley Hospital began using standards to evaluate its Admissions Department. The standard was broken into two types of admissions as follows: Type of Admission Standard Time to Complete Admission Record Unscheduled 30 min. Scheduled 15 min. The unscheduled admission took longer because name, address, and insurance information needed to be determined and verified at the time of admission. Information was collected on scheduled admissions prior to admitting the patient, thus requiring less time in admissions. The Admissions Department employs four...
This is from a Study of Buffer Solutions and pH of Salt Solutions Lab. I calculated...
This is from a Study of Buffer Solutions and pH of Salt
Solutions Lab. I calculated Ka to be 3.2*10^-5. Why is my value
larger than the standard value?
Procedure:
10. How does your calculated value of Ka compare with the standard value of Ka for acetic acid? Discuss why your value may be larger or smaller than the standard value. Caleutats Ka 3.2x 10-5) Cyato-s Learning Objectives: 1. To test the acidic and basic properties of ionic compounds 2....
I need help with the problem in the last photo.. I thought I’d post my lab...
I need help with the problem in the last photo.. I thought I’d
post my lab explanation and data if that helps you get a better
understanding, but it’s just the question at the end. I know I need
to use the Henderson Hasselbach equation.. so... 4.70 = pKa + log(
[acetate-ion] / [acetic-ion] ) and solve for pKa, then Ka.. but how
do I find the concentrations to put in the log fraction?
Thanks, in advance!
Learning Objectives: 1....
I know some of the measured pH values are a little off due to error in...
I
know some of the measured pH values are a little off due to error
in the lab, but I need help filling out the “Ion Hydrolyzed” table
and then the “Net Ionic Equation” part. I remember doing net ionic
equations in General Chemistry I, bit don’t see how it applies
here.
Thanks, in advance! (i will rate!)
Learning Objectives: 1. To test the acidic and basic properties of ionic compounds. 2. To create a buffer solution and calculate its...
please help with no 3,4,5 and 6 Thanks 1. What is standard error? Measure of statistical...
please help with no 3,4,5 and 6
Thanks
1. What is standard error? Measure of statistical accuracy of an estimate, equal to the standard deviation of the theorental distribution of a large populanon of such estimates 2. What calculation is used to describe the variation in measurements. 3. In experiment 3.2. You will be measuring out 40ml of volume. How many times will you measure 40 ml? 4. What is the difference for each time you measure out 40ml? In...
A glass electrode is calibrated using two standards and the voltage of the electrode in each standard was measured. The voltage of an unknown solution was also measured. All measurements were conducted at 20° C. What is the theoretical slope of the electrode in mV/ pH unit at 20°C and give your answer rounded to two decimal places. Sample Nane pH Value (unitless) Voltage (mv) Standard 1 1.672 + 300.0 Standard 2 6.940 + 17.7 Unknown + 140.0
Calibration of a glass electrode gave a reading of 134.9 mV with a 0.05 m potassium hydrogen phthalate buffer standard (pH = 4.015), and a reading of -163.2 mV with a 0.01 m borax buffer standard (pH = 9.139), both measured at 30°C. What is the observed slope (mV/PH unit) of the calibration curve? slope observed = mV/PH What is the theoretical slope at 30°C? slope theoretical = mV/pH What is B, the electromotive efficiency, to three significant figures? B...
Valley Hospital began using standards to evaluate its Admissions Department. The standard was broken into two types of admissions as follows: Type of Admission Standard Time to Complete Admission Record 30 min. 15 min. Unscheduled Scheduled The unscheduled admission took longer because name, address, and insurance information needed to be determined and verified at the time of admission. Information was collected on scheduled admissions prior to admitting the patient, thus requiring less time in admissions. The Admissions Department employs four...
Partner's Name Instructor Procedure I, Voltaic Cell Zn/Zn2+ 1.0 M || Cu2+ 1.0 M/Cu In the space below write the equations for the two half reactions and sum them appropriately to calculate the standard reaction potential for a 1.0 M voltaic cell. Show the overall net ionic equation for this reaction. 9pts.) Standard reaction potential Write the expression for Q for this redox reaction. (4 pes) In the space below show a calculation using the Nemst equation to determine the...
This is from a Study of Buffer Solutions and pH of Salt
Solutions Lab. I calculated Ka to be 3.2*10^-5. Why is my value
larger than the standard value?
Procedure:
10. How does your calculated value of Ka compare with the standard value of Ka for acetic acid? Discuss why your value may be larger or smaller than the standard value. Caleutats Ka 3.2x 10-5) Cyato-s Learning Objectives: 1. To test the acidic and basic properties of ionic compounds 2....
I need help with the problem in the last photo.. I thought I’d
post my lab explanation and data if that helps you get a better
understanding, but it’s just the question at the end. I know I need
to use the Henderson Hasselbach equation.. so... 4.70 = pKa + log(
[acetate-ion] / [acetic-ion] ) and solve for pKa, then Ka.. but how
do I find the concentrations to put in the log fraction?
Thanks, in advance!
Learning Objectives: 1....
I
know some of the measured pH values are a little off due to error
in the lab, but I need help filling out the “Ion Hydrolyzed” table
and then the “Net Ionic Equation” part. I remember doing net ionic
equations in General Chemistry I, bit don’t see how it applies
here.
Thanks, in advance! (i will rate!)
Learning Objectives: 1. To test the acidic and basic properties of ionic compounds. 2. To create a buffer solution and calculate its...
please help with no 3,4,5 and 6
Thanks
1. What is standard error? Measure of statistical accuracy of an estimate, equal to the standard deviation of the theorental distribution of a large populanon of such estimates 2. What calculation is used to describe the variation in measurements. 3. In experiment 3.2. You will be measuring out 40ml of volume. How many times will you measure 40 ml? 4. What is the difference for each time you measure out 40ml? In...
Most questions answered within 3 hours.
-
Which of the following statements is true regarding the nature
of culture?
A.We are born with...
asked 7 minutes ago -
(a) 2
NO2(g) à 2
NO(g) +
O2(g)
The rate law for this reaction
is 2nd...
asked 10 minutes ago -
Write the overall reaction for the RedOx
reaction (below) when it occurs in an acidic environment....
asked 17 minutes ago -
Two forces are acting on an object. Force 1 on the object is 6.0
N and...
asked 18 minutes ago -
You are planning for retirement. You plan to work for 20 years.
Starting a year from...
asked 31 minutes ago -
The African Adventures exhibit water system holds approximately
850,000 gallons (3.2x109 g) of water. The temperature...
asked 22 minutes ago -
which of the following is capital?
the barn a farmer uses to hold the chickens he...
asked 33 minutes ago -
Attribute
Sample Value
Sample Value
Sample Value
Sample Value
pirate_num
11
22
43
54
pirate_lname
James...
asked 26 minutes ago -
10. Two forces act on a 3 kg object, the gravitational force and
a second, constant...
asked 43 minutes ago -
Dividing Partnership Net Loss
Leigh Meadows and Byron Leef formed a partnership in which the
partnership...
asked 40 minutes ago -
Discuss how Entrepreneurial leadership style differs
from traditional leadership?
asked 1 hour ago -
A futuristic design for a car is to have a large solid
disk-shaped flywheel within the...
asked 1 hour ago