When using the nernst equation in potentiometric determination of sodium, how do you find ax (activity...
When using the nernst equation in potentiometric determination of sodium, how do you find ax (activity of the ion Na+)?
Homework Answers
In potentiometry, the potential measured is proportional to the activity of the ion according to Nernst equation
= RT/nF .ln
(ai/aio) where RT/nF is essentially a
constant aio represents activity
of the ion in a standard solution.
Activity can be expresses as the product of activity coeffecient and concentration. The value of activity coefficient is 1 at infinite dilutions.
Add Answer to:
When using the nernst equation in potentiometric determination
of sodium, how do you find ax (activity...
How can I use the Nernst equation to determine the error involved when a potentiometric measurement...
How can I use the Nernst equation to determine the error involved when a potentiometric measurement has an error of ±1.5 mv for an analyte undergoing a 2-electron reduction? I'd like to see all the mathematical steps in this process, too.
When doing a Nernst equation, how do you calculate n? I know for something like Zn|Zn2+(1.0...
When doing a Nernst equation, how do you calculate n? I know for something like Zn|Zn2+(1.0 M)||Cu2+(1.0 M)|Cu where you have 2+ and 2+ n would be 2, but what about something like Pb|Pb2+(1.0 M)||Ag+(0.10 M)|Ag where you have 2+ and + I'm confused and can't find an answer anywhere
When sodium and chromium are the two available cations, using the activity series for oxidation half-reactions,...
When sodium and chromium are the two available cations, using the activity series for oxidation half-reactions, determine and write the chemical equation. Na(s)---->Na^+ (aq) + e^ - Cr(s)----> Cr^3+ (aq) + 3 e^ -
Write, but do not solve, the Nernst equation for the halt-cell reaction from c, including, activity...
Write, but do not solve, the Nernst equation for the halt-cell reaction from c, including, activity coefficients: AgI (s) + e^- ==rightarrow Ag (s) + I^- (aq., 0.025 M) E^o = -0.151 V vs. SHE
Classroom Activity 2: The Carbonate System When a carbonate salt, such as sodium carbonate, is placed...
Classroom Activity 2: The Carbonate System When a carbonate salt, such as sodium carbonate, is placed into an acidic solution, carbonic acid (H.CO. weak acid, is formed. 1. Write the chemical formula for the carbonate ion. 2. Draw the Lewis structure for the carbonate ion. 3. How many hydrogen ions can react with the carbonate ion? 4. The chemical formula for carbonic acid is H.CO, How many K values does this acid have? 5. Starting from carbonic acid, write the...
Name Section/CRN EXPERIMENT 9 POTENTIOMETRIC DETERMINATION OF AN EQUILIBRIUM CONSTANT PRE-LABORATORY QUESTIONS . The following preparatory...
Name Section/CRN EXPERIMENT 9 POTENTIOMETRIC DETERMINATION OF AN EQUILIBRIUM CONSTANT PRE-LABORATORY QUESTIONS . The following preparatory questions should be answered before coming to b. are intended to introduce you to several ideas that are important to aspects of the experiment. You must turn in your work to your instructor before you allowed to begin the experiment. Potassium acid phthalate, KHP (KHC.H.O.), is a primary standard reagent used to determine exactly the concentration of a solution of base, such as NaOH,...
When you are using exponential smoothing equation, how do you get the first forecast value when...
When you are using exponential smoothing equation, how do you get the first forecast value when one is not provided?
The salt sodium formate, NaCHO2(s), completely dissociates into Na+(aq) and CHO2−(aq) in an aqueous environment. The...
The salt sodium formate, NaCHO2(s), completely dissociates into Na+(aq) and CHO2−(aq) in an aqueous environment. The Na+ ion has no acid or base properties, but the formate ion is the conjugate base of the weak acid, formic acid. Part a. Write a balanced chemical equation showing how the formate ion reacts with water to affect the pH of the resulting solution (you can ignore the sodium ion in your balanced equation). Part b. Find the pH of a 0.100 M...
How do you write a half redox equation and redox reaction for sodium oxalate with sulfuric...
How do you write a half redox equation and redox reaction for sodium oxalate with sulfuric acid and potassium permanganate?
How do you find the atomic radius of neon, sodium and magnesium in nm?
How do you find the atomic radius of neon, sodium and magnesium in nm?
Write, but do not solve, the Nernst equation for the halt-cell reaction from c, including, activity coefficients: AgI (s) + e^- ==rightarrow Ag (s) + I^- (aq., 0.025 M) E^o = -0.151 V vs. SHE
Classroom Activity 2: The Carbonate System When a carbonate salt, such as sodium carbonate, is placed into an acidic solution, carbonic acid (H.CO. weak acid, is formed. 1. Write the chemical formula for the carbonate ion. 2. Draw the Lewis structure for the carbonate ion. 3. How many hydrogen ions can react with the carbonate ion? 4. The chemical formula for carbonic acid is H.CO, How many K values does this acid have? 5. Starting from carbonic acid, write the...
Name Section/CRN EXPERIMENT 9 POTENTIOMETRIC DETERMINATION OF AN EQUILIBRIUM CONSTANT PRE-LABORATORY QUESTIONS . The following preparatory questions should be answered before coming to b. are intended to introduce you to several ideas that are important to aspects of the experiment. You must turn in your work to your instructor before you allowed to begin the experiment. Potassium acid phthalate, KHP (KHC.H.O.), is a primary standard reagent used to determine exactly the concentration of a solution of base, such as NaOH,...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago