(a) When the difference in pH across the membrane of a glass electrode at 25 °C...
(a) When the difference in pH across the membrane of a glass electrode at 25 °C is 4.63 pH units, how much voltage is generated by the pH gradient? (b) What would be the voltage for the same pH difference at 37 °C? (c) The pH electrode has a selectivity coefficient k for Na+ of 10^-8 . What is the measured the pH value when the solution pH is at 9.0 with a Na+ concentration of 0.1 M?
Homework Answers
Request Answer!
We need at least 10 more requests to produce the answer.
0 / 10 have requested this problem solution
The more requests, the faster the answer.
Add Answer to:
(a) When the difference in pH across the membrane of a glass
electrode at 25 °C...
When the difference in pH across the membrane of a glass electrode at 25 degree C...
When the difference in pH across the membrane of a glass electrode at 25 degree C is 4.40 pH units, how much voltage is generated by the pH gradient? (F = 96485 C/mol; R = 8.3145 J/mol K) mV (three significant figures) (b) What would the voltage be for the same pH difference at 37 degree C? (F = 96485 C/mol; R = 8.3145 J/mol K) mv (three significant figures) When calibrating a glass electrode, 0.025 m potassium dihydrogen phosphate/0.025...
For a Corning 015 glass membrane electrode, the selectivity coefficient K is KH+/Na+ ≈ 1x10−11. What...
For a Corning 015 glass membrane electrode, the selectivity coefficient K is KH+/Na+ ≈ 1x10−11. What is the expected error when measuring the pH of a solution in which the activity of H+ is 2 x 10−13 M and activity of Na+ is 0.05 M? Thank you!
A glass membrane electrode is constructed that has a selectivity for Na vs Li, K, and...
A glass membrane electrode is constructed that has a selectivity for Na vs Li, K, and Ag with the following selectivity coefficents: K = 1/2800; KNax = 1/2750; and KwaAg = 1/3015. Answer the following questions: 1. What is the potential for the Na ISE when immersed in the following solutions: a) A 0.0100 M Nacl solution b) A 0.1100 M NaOH Solution c) A 0.5701 M NaNO Solution 2. Compute the potential change for each of the solutions in...
In chloroplasts at 25C, the voltage difference across the thylakoid membrane is approximately 0.03V and the...
In chloroplasts at 25C, the voltage difference across the thylakoid membrane is approximately 0.03V and the pH difference across this membrane is approximately 2 pH units. What percentage of the total proton motive force in the chloroplast is due to the electrical potential difference across the thylakoid membrane? Show work. The equation we are supposed to use is pmf=Vm (membrane potential)+2.303RT *pH gradient/Faraday's constant
Lo 10: Electrochemical Gradient The difference in voltage across the membrane is called the __________________________________. The...
Lo 10: Electrochemical Gradient The difference in voltage across the membrane is called the __________________________________. The inside of a normal cell is ___________________ (+/-); while the outside is ___________(+/-). The resting membrane potential of a neuron is ___________mV. Diagram the relative ratios of Ca++, Na+ and K+ in a cell under resting conditions. Draw an arrow for each of the molecules indicating which direction would be passive transport (into or out of the cell). For each of the following sentences, fill in...
A pH electrode is attached to a voltmeter that reads 0.253V when the electrode is immersed...
A pH electrode is attached to a voltmeter that reads 0.253V when the electrode is immersed in a buffer solution with a pH of 3.25 at 25 degree C. After the pH electrode is moved to an unknown buffer solution at 25 degree C, the reading of the voltmeter is lowered by 43%. From the Nernst potential equation, come up with an equation relating the measured voltage (delta psi = psi_sensor - psi_solution) to the pH of the solution. Calculate...
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
What is the pH difference (△pH) across a membrane at 310 K if the membrane potential...
What is the pH difference (△pH) across a membrane at 310 K if the membrane potential is -0.15 V and the overall Gibb's free energy change across the membrane is -19 .0 kJ mol-1? (R = 8.315 J/mol-K; F = 96,485 J/V-mol). Please show me all the steps of how to solve this. Thank you!
NUMBER 10 PLEASE -Kor Cor The Henry's law constant of oxygen in water at 25 °C...
NUMBER 10 PLEASE
-Kor Cor The Henry's law constant of oxygen in water at 25 °C is 773 atm mol'' kg of water. Calculate the molality of oxygen in water under a partial pressure of 0.20 atm. Assume that the solubility of oxygen in blood at 37 °C is roughly the same as that in water at 25 °C, comment on the prospect for our survival without hemoglobin molecules. The total volume of blood in the human body is about...
The alkaline error observed when the pH of alkaline solutions is measured occurs because: A. alkaline...
The alkaline error observed when the pH of alkaline solutions is measured occurs because: A. alkaline solutions can damage the glass electrode. B. the membrane of the glass electrode can respond to other cations besides H+. C. not enough time was allowed for the electrode to equilibrate with the solution. D. the glass electrode was saturated with H+ cations. E. the junction potential increases the uncertainty.
When the difference in pH across the membrane of a glass electrode at 25 degree C is 4.40 pH units, how much voltage is generated by the pH gradient? (F = 96485 C/mol; R = 8.3145 J/mol K) mV (three significant figures) (b) What would the voltage be for the same pH difference at 37 degree C? (F = 96485 C/mol; R = 8.3145 J/mol K) mv (three significant figures) When calibrating a glass electrode, 0.025 m potassium dihydrogen phosphate/0.025...
A glass membrane electrode is constructed that has a selectivity for Na vs Li, K, and Ag with the following selectivity coefficents: K = 1/2800; KNax = 1/2750; and KwaAg = 1/3015. Answer the following questions: 1. What is the potential for the Na ISE when immersed in the following solutions: a) A 0.0100 M Nacl solution b) A 0.1100 M NaOH Solution c) A 0.5701 M NaNO Solution 2. Compute the potential change for each of the solutions in...
A pH electrode is attached to a voltmeter that reads 0.253V when the electrode is immersed in a buffer solution with a pH of 3.25 at 25 degree C. After the pH electrode is moved to an unknown buffer solution at 25 degree C, the reading of the voltmeter is lowered by 43%. From the Nernst potential equation, come up with an equation relating the measured voltage (delta psi = psi_sensor - psi_solution) to the pH of the solution. Calculate...
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
NUMBER 10 PLEASE
-Kor Cor The Henry's law constant of oxygen in water at 25 °C is 773 atm mol'' kg of water. Calculate the molality of oxygen in water under a partial pressure of 0.20 atm. Assume that the solubility of oxygen in blood at 37 °C is roughly the same as that in water at 25 °C, comment on the prospect for our survival without hemoglobin molecules. The total volume of blood in the human body is about...
The alkaline error observed when the pH of alkaline solutions is measured occurs because: A. alkaline solutions can damage the glass electrode. B. the membrane of the glass electrode can respond to other cations besides H+. C. not enough time was allowed for the electrode to equilibrate with the solution. D. the glass electrode was saturated with H+ cations. E. the junction potential increases the uncertainty.
Most questions answered within 3 hours.
-
1-Write an algorithm to get two numbers from the user (as
inputs) and calculate the sum...
asked 2 hours ago -
Define white-collar crime. What is the difference between
offender and offense-based definitions of white-collar crime? What...
asked 3 hours ago -
Consider a reaction which is 1st order with respect to A and 1st
order with respect...
asked 3 hours ago -
c++
The length of the hypotenuse of a right-angled triangle is the
square root of the...
asked 3 hours ago -
When a metal rod is heated, not only its resistance but also its
length and cross‐sectional...
asked 3 hours ago -
write a c++ program that computes the L^1 - Norm of a given
vector (L^1 norm...
asked 3 hours ago -
A manufacturer of banana chips would like to know whether its
bag filling machine works correctly...
asked 3 hours ago -
Complete the chapter case, "Turnover Analysis".
Chapter Case
Turnover Analysis
You recently completed your company’s new...
asked 3 hours ago -
What is the pH of solutions having the following H3O+
concentrations? Identify each as acidic, basic,...
asked 3 hours ago -
How does over-voltage of the diode usually occur?
asked 4 hours ago -
If you step on a dirty nail, your doctor will recommend you
update your Tetanus vaccination....
asked 4 hours ago -
Suppose that decreases in the price of milk lead to decrease s
in the retail prices...
asked 4 hours ago