Homework Answers
Add Answer to:
5) Why should the medium be acidic in KMnO4 standardization? 6) What is the aim of...
6) What is the aim of adding SnCl, in Fe determination? Write the related reaction. 7)...
6) What is the aim of adding SnCl, in Fe determination? Write the related reaction. 7) What are the function(s) of preventive solution? Explain. 3) Why an indirect method is applied for Ca“* determination? POSTAD AINA
2) During standardization of KMnO4 if you observe a brown precipitate, what does this indicate? Do...
2) During standardization of KMnO4 if you observe a brown precipitate, what does this indicate? Do you continue the titration in this situation or stop and repeat it? 3) Why do we perform blank analysis in KMnO standardization? 4) Why do we add HgCl, and why do we add it quickly? Write the related reaction.
Of Oxalate Before beginning this experiment in the laboratory, you should be able to answer the f...
of Oxalate Before beginning this experiment in the laboratory, you should be able to answer the following questions 1. If0.4586 g of sodium oxalate, Na C204, requires 33.67 mL of a KMno4 solution to reach the end point, what is the molarity of the KMnO4 solution? Titration of an oxalate sample gave the following percentages: 15.53%, 15.55%, and 15.56%. Calculate the average and the standard deviation. 2. 3. Why does the solution decolorize upon standing after the equivalence point has...
What is the Balanced Chemical Equation? The FAS confuses me. please explain no 4 permanganate Experiment...
What is the Balanced Chemical Equation? The FAS confuses me.
please explain
no 4 permanganate Experiment 30 Oxidation-Reduction Titration and Analysis of an Unknown Mixture PURPOSE OY BXPERIMENT: Standardizo a solution of Kno4, and determine the percent by mass of Na2C204 in an unknown mixture. The process of titration may be used for the standardization of solu- tions of oxidizing and/or reducing agents, provided a suitable method for observing the andpoint of the reaction is available. When potassium peran- ganata,...
1. (4p) In an acidic aqueous solution, Fe2+ ions are oxidized to Fe3+ ions by MnO4": 5Fe2+(aq) + MnO4 (aq) + 8H(aq) → 5...
1. (4p) In an acidic aqueous solution, Fe2+ ions are oxidized to Fe3+ ions by MnO4": 5Fe2+(aq) + MnO4 (aq) + 8H(aq) → 5Fe3+ (aq) + Mn2(aq) + 4H2O(1) In part A of the experiment, suppose that 1.067 g of Fe(NH4)2(SO4)2.6H2O(s) are placed in a 250 ml Erlenmeyer flask to which 20 mL of water and 8 mL of 3 M H2SO4(aq) are added. The solution was titrated to the end point by adding 26.89 mL of KMnO4(aq) from the...
5. Consider the galvanic cell, Pb(s) Pb(aq) || Cu(aq) Cu(s) What should be done to increase...
5. Consider the galvanic cell, Pb(s) Pb(aq) || Cu(aq) Cu(s) What should be done to increase the cell potential (i.e., become more positive)? Be specific when stating which concentration should be increased or decreased. 6. Calculate the cell potential (Ecell) at 25°C for the cell Fe(s) / (Fe*(0.100 M) || Pd**(1.0 * 10M) | Pd(s) Given that the standard reduction potential for Fe* /Fe is -0.45 V and for Pd/Pd is +0.95 V. 8. Balance the following reduction-oxidation reaction in...
**PLEASE ANSWER ALL QUESTIONS AND EXPLAIN ** TUTORIAL 7. GROUP 16 ELEMENTS 1. What are the...
**PLEASE ANSWER ALL QUESTIONS AND EXPLAIN **
TUTORIAL 7. GROUP 16 ELEMENTS 1. What are the two commercial methods for the preparation of oxygen? 2. Give an example of an acidic oxide and a basic oxide. 3. Name the allotropes of oxygen and sulphur and discuss how they can he 4. Give uses of the following: SO2, Na2S20s and H2SO4. 5. Give equations for the steps in the contact process for the manufacture o 6. Write equations for the following:...
5. Why does benzene float on water? 6. What is the meaning of a boiling point?...
5. Why does benzene float on water? 6. What is the meaning of a boiling point? Provide a scientific definition. 7. What does anion mean? 8. The insoluble compound (the white ppt) resulted from testing for SO4-2 ion is ------------------------- 9. The gas bubbles that are produced when adding HCl to a solution that contains CO3-2 represents the formation of ______________. 10. When a solution of Cl- ion is mixed with a solution of AgNO3 (in acidic environment), what is...
explain why casein precipitates (curdles) when acetic acid is added to your milk mixture. What is...
explain why casein precipitates (curdles) when acetic acid is added to your milk mixture. What is the function of acetic acid. 5. This precipitation can also be achieved through bacterial fermentation (e.g., spoiled milk). Explain what is happening during this process. 6. A third method of curdling milk is by adding the enzyme rennin (chymosin). Most cheeses are made this way. Do some online research and explain how this protease enzyme works and why milk curdles when it's added. 7....
Please give me answers with details.. 1. Why should cotton provide an effective barrier against air...
Please give me answers with details..
1. Why should cotton provide an effective barrier against air contaminants, when the spaces between threads are relatively large? 2. What other ways might be used to close test tubes, still retaining a sound bacteriologic technique? 3. How would you protect culture medium from lint in a liter Erlenmeyer flask in which the cotton plug had to be large? 4. Explain your preference of method for the sterilization of : A hypodermic needle, rubber...
6) What is the aim of adding SnCl, in Fe determination? Write the related reaction. 7) What are the function(s) of preventive solution? Explain. 3) Why an indirect method is applied for Ca“* determination? POSTAD AINA
2) During standardization of KMnO4 if you observe a brown precipitate, what does this indicate? Do you continue the titration in this situation or stop and repeat it? 3) Why do we perform blank analysis in KMnO standardization? 4) Why do we add HgCl, and why do we add it quickly? Write the related reaction.
of Oxalate Before beginning this experiment in the laboratory, you should be able to answer the following questions 1. If0.4586 g of sodium oxalate, Na C204, requires 33.67 mL of a KMno4 solution to reach the end point, what is the molarity of the KMnO4 solution? Titration of an oxalate sample gave the following percentages: 15.53%, 15.55%, and 15.56%. Calculate the average and the standard deviation. 2. 3. Why does the solution decolorize upon standing after the equivalence point has...
What is the Balanced Chemical Equation? The FAS confuses me.
please explain
no 4 permanganate Experiment 30 Oxidation-Reduction Titration and Analysis of an Unknown Mixture PURPOSE OY BXPERIMENT: Standardizo a solution of Kno4, and determine the percent by mass of Na2C204 in an unknown mixture. The process of titration may be used for the standardization of solu- tions of oxidizing and/or reducing agents, provided a suitable method for observing the andpoint of the reaction is available. When potassium peran- ganata,...
1. (4p) In an acidic aqueous solution, Fe2+ ions are oxidized to Fe3+ ions by MnO4": 5Fe2+(aq) + MnO4 (aq) + 8H(aq) → 5Fe3+ (aq) + Mn2(aq) + 4H2O(1) In part A of the experiment, suppose that 1.067 g of Fe(NH4)2(SO4)2.6H2O(s) are placed in a 250 ml Erlenmeyer flask to which 20 mL of water and 8 mL of 3 M H2SO4(aq) are added. The solution was titrated to the end point by adding 26.89 mL of KMnO4(aq) from the...
5. Consider the galvanic cell, Pb(s) Pb(aq) || Cu(aq) Cu(s) What should be done to increase the cell potential (i.e., become more positive)? Be specific when stating which concentration should be increased or decreased. 6. Calculate the cell potential (Ecell) at 25°C for the cell Fe(s) / (Fe*(0.100 M) || Pd**(1.0 * 10M) | Pd(s) Given that the standard reduction potential for Fe* /Fe is -0.45 V and for Pd/Pd is +0.95 V. 8. Balance the following reduction-oxidation reaction in...
**PLEASE ANSWER ALL QUESTIONS AND EXPLAIN **
TUTORIAL 7. GROUP 16 ELEMENTS 1. What are the two commercial methods for the preparation of oxygen? 2. Give an example of an acidic oxide and a basic oxide. 3. Name the allotropes of oxygen and sulphur and discuss how they can he 4. Give uses of the following: SO2, Na2S20s and H2SO4. 5. Give equations for the steps in the contact process for the manufacture o 6. Write equations for the following:...
explain why casein precipitates (curdles) when acetic acid is added to your milk mixture. What is the function of acetic acid. 5. This precipitation can also be achieved through bacterial fermentation (e.g., spoiled milk). Explain what is happening during this process. 6. A third method of curdling milk is by adding the enzyme rennin (chymosin). Most cheeses are made this way. Do some online research and explain how this protease enzyme works and why milk curdles when it's added. 7....
Please give me answers with details..
1. Why should cotton provide an effective barrier against air contaminants, when the spaces between threads are relatively large? 2. What other ways might be used to close test tubes, still retaining a sound bacteriologic technique? 3. How would you protect culture medium from lint in a liter Erlenmeyer flask in which the cotton plug had to be large? 4. Explain your preference of method for the sterilization of : A hypodermic needle, rubber...
Most questions answered within 3 hours.
-
A new battery's voltage may be acceptable (A) or unacceptable
(U). A certain flashlight requires two...
asked 23 seconds ago -
Water has significant IMF, which result in many of its unique
properties—high boiling point relative to...
asked 19 minutes ago -
I need help with an executive summary for Adidas Items to be
included are a discription...
asked 12 minutes ago -
19. Most progressive reform activists were white
and a. upper class. b. lower class. c. wokring...
asked 14 minutes ago -
If X is a binomial random variable with n = 8
and p = 0.2, the...
asked 24 minutes ago -
Seasonal or cyclical variation in a time-series model…
---exhibits irregular
variation that can be accounted for...
asked 26 minutes ago -
Please use Barney's VRIO framework of analysis to evaluate a
firm's competencies. Please choose a specific...
asked 38 minutes ago -
Where would you expect to have diabetes contributing to the most
DALYs in 2035, according to...
asked 40 minutes ago -
1.) Major league baseball salaries averaged $1.5 million with a
standard deviation of $1 million in...
asked 49 minutes ago -
A hedge fund is holding a three-year,
$10 million face value 6 percent annual coupon bond...
asked 1 hour ago -
The focal length of a makeup (concave) mirror is 0.48 m. What
magnification does this mirror...
asked 1 hour ago -
TRUE/FALSE
Long-lived assets that are tangible in nature, used in the
operations of the business, and...
asked 1 hour ago