Which of the following are errors that can occur when measuring
the pH with a glass combination electrode?
Homework Answers
Glass combination electrodes have higher sensitivity for H+ over other ions
The internal AgAgCl reference electrode will have a fixed potential
Therefore, the errors are possible due to
Uncertainty in the pH of the standard buffers used to calibrate the instrument
Sodium error at high pH
Junction potential
Add Answer to:
Which of the following are errors that can occur when measuring
the pH with a glass...
Which of the following are NOT potential error sources associated with pH measurement using a glass...
Which of the following are NOT potential error sources associated with pH measurement using a glass electrode? Heavy metal ions Junction potential Alkaline error Acid error
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.
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 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...
The junction potential develops due to charge separation T F. The junction potential in a salt...
The junction potential develops due to charge separation T F. The junction potential in a salt bridge can be reduced somewhat if ions with similar mobilities are used inside the salt bridge. T F Junction potentials put a fundamental limit on the accuracy of direct potentiometric measurements T F The junction potential is not part of the cathode or anode, yet we usually know its contribution Ecell-. T F The junction potential represents a balance between unequal ion...
In the lab, a student determines the density of a metal object by measuring its mass...
In the lab, a student determines the density of a metal object by measuring its mass on a balance and its volume by displacement in a graduated cylinder. The data collected by the student is shown. mass of object: 44.701 g volume of water in cylinder before object submersed: 29.47 ml volume of water + object in cylinder: 35.33 mL Calculate the density of the object. d= g/mL Based on the recorded volume data, and assuming that the student used...
Video Assessment Questions 1. What possible errors can occur at Norchem Drug Testing? 2. Which type...
Video Assessment Questions 1. What possible errors can occur at Norchem Drug Testing? 2. Which type of error is of greater concern to Norchem Drug Testing? 3. Norchem Drug Testing tries to ensure that the probability of a false positive is near zero. What type of probability is this? In the context of hypothesis testing, what would we call this probability? 4. Give a scenario other than drug testing that is designed to keep the probability of making a Type...
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....
Lab 5 Buffers 1. Dissolved ions in salt solutions can act as acids or bases and...
Lab 5 Buffers 1. Dissolved ions in salt solutions can act as acids or bases and react with water to produce hydronium ions or hydroxide ions that contribute to the pH of the salt solution. Since strong acids and strong bases completely ionize in solution, the reverse reaction essentially does not occur, meaning that the resulting conjugate base of a strong acid or conjugate acid of a strong base do NOT act as acids or bases. Ions that are conjugate...
Which of the following will occur when solutions of ZnSO4(aq) and MgCl2(aq) are mixed? A precipitate...
Which of the following will occur when solutions of ZnSO4(aq) and MgCl2(aq) are mixed? A precipitate of MgSO4 will form; Zn and CI" will be spectator ions. A precipitate of ZnCl2 will form; Mg and SO4 will be spectator ions. O No precipitate will form. A precipitate of MgCl2 will form: Zn2 and SO4will be spectator ions. A precipitate of ZnSO4 will form ; Mg" and CIT will be spectator ions.
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.
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
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...
In the lab, a student determines the density of a metal object by measuring its mass on a balance and its volume by displacement in a graduated cylinder. The data collected by the student is shown. mass of object: 44.701 g volume of water in cylinder before object submersed: 29.47 ml volume of water + object in cylinder: 35.33 mL Calculate the density of the object. d= g/mL Based on the recorded volume data, and assuming that the student used...
Video Assessment Questions 1. What possible errors can occur at Norchem Drug Testing? 2. Which type of error is of greater concern to Norchem Drug Testing? 3. Norchem Drug Testing tries to ensure that the probability of a false positive is near zero. What type of probability is this? In the context of hypothesis testing, what would we call this probability? 4. Give a scenario other than drug testing that is designed to keep the probability of making a Type...
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....
Which of the following will occur when solutions of ZnSO4(aq) and MgCl2(aq) are mixed? A precipitate of MgSO4 will form; Zn and CI" will be spectator ions. A precipitate of ZnCl2 will form; Mg and SO4 will be spectator ions. O No precipitate will form. A precipitate of MgCl2 will form: Zn2 and SO4will be spectator ions. A precipitate of ZnSO4 will form ; Mg" and CIT will be spectator ions.
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