During the first part of the video performed by the TA, which reactant (Fe3+ or SCN-)...
During the first part of the video performed by the TA, which reactant (Fe3+ or SCN-) is in excess and which is the limiting reactant? What is the purpose of making one reactant in excess? (Connect to Le Chatelier's principle ) How will you know the concentration of Fe(SCN)2+ ?
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During the first part of the video performed by the TA,
which reactant (Fe3+ or SCN-)...
Use your own words to describe what is a reversible reaction and define dynamic equilibrium. What...
Use your own words to describe what is a reversible reaction and define dynamic equilibrium. What is the equilibrium Keg expression for the chemical reaction performed in this lab? (5 points) 2.Explain what is the purpose of using UV-vis spectroscopy for this particular experiment. What is the maximum wavelength in nm that the TA used to collect the absorbance value of Fe(SCN)2+ ? (5 points) 3.Use the absorbance and concentration data provided in the first part of the TA video...
My question is #2 for the reaction Fe3+ (aq) + SCN- (aq) FeSCN2+ (aq). The goal...
My question is #2 for the reaction Fe3+ (aq) + SCN- (aq)
FeSCN2+ (aq). The goal is to predict the color change (darker or
lighter) for test tubes 2-8. I have attached the supplemental
sheets given to help with the problem. The test tubes 2-8 are being
manipulated either by temperature or things being added which can
be seen by one of the pictures.
2. For reaction "UCTIONS are increased by the same amount. Fe3+ (aq) + SCN (aq) $...
Le Chatelier's Principle 3. For Part Ill, use Le Châteller's Principle to explain the colour changes...
Le Chatelier's Principle 3. For Part Ill, use Le Châteller's Principle to explain the colour changes observed in test tubes 2 and 3 upon the addition of HC and A . Also, explain the observed colour changes in the test tubes placed in hot and cold water. (4 marks) Test Tube 2: Test Tube 3: Hot Water bath: Cold Water bath: Extension: 1. NaCl(aq) + HCl(aq) = NaCl(aq) + H2O + Cl2(g) When the above system is cooled, gas bubbles...
Show the deruaton of equation Peq Astd L std [FeNCS2.hq. A Х[FeNCS2.1.d(2) The conscentration of ...
how
do you show the derivation?
Show the deruaton of equation Peq Astd L std [FeNCS2.hq. A Х[FeNCS2.1.d(2) The conscentration of FeNcs FeNcsJ ) in he sandardc fouand by making assumption based on Le Chatelier's principle. The standard solution contains a very large concentration of Feyt aFe3、and small initial concentration of SCN-gon (The Fein the standard is 0mes morete in the trials) The high Fe foreces - ions. Therefore, for every one the reaction far to the nght, using up...
Fe3(aq) FESCN (aq) SCN (aq) In this experiment, we'll be examining the temperature-dependence of the rate constant...
Fe3(aq) FESCN (aq) SCN (aq) In this experiment, we'll be examining the temperature-dependence of the rate constant for the reaction above. 1. Using the UV-Vis instrument, you measured a room temperature absorbance for FESCN2 at 477 nm of 0.815. What is its concentration in molarity (M)? Please show all work. The molar absorptivity for FeSCN2 is 4,258 м"сm1 a. Answer: b. You calculated the [FeSCN2] above from the observed room temperature absorbance. Which one of the following statements about the...
What's the concentration of [FeSCN2+] using limiting reactant theory and equation? For each test tube solution...
What's the concentration of [FeSCN2+] using limiting
reactant theory and equation?
For each test tube solution enter the initial concentration of Fe+ and SCNthe equilibrium concentration of FeSCN2: into the ICE table given. Complete entries for the rest of the table and calculate the K value for each of the tables. The values of K should be confined to a narrow range to reflect constancy. Comment on the quality of your work in this regard and calculate the average K....
I. Write the equilibrium constant expression, K for the following reaction Fe"(ag) FENCS(ag) SCN (ag) + CFENCS D 2....
I. Write the equilibrium constant expression, K for the following reaction Fe"(ag) FENCS(ag) SCN (ag) + CFENCS D 2. In part A of Experiment 34, it was assumed that all of the SCN added to the reaction mixture was converted to product (FeNCS). Which of the following best explains why that assumption was valid? A) The moles of Fe added equaled the moles of SCN- added. B) In part A, the SCN was the limiting reactant whereas in part B,...
the guiding questions. the max absorbance is 460. Guiding questions complex turque . Compare the molar...
the
guiding questions. the max absorbance is 460.
Guiding questions complex turque . Compare the molar absorptivity coefficients you obtained with SCN and Fe" as limiting reagents. Would you expect them to be the same? Why or why not? (Week 1) • The accepted molar absorptivity coefficient for FeSCN is 7.0x10' M'cm''. Find the bias and relative bias of your values and suggest possible sources of errors. (Week 1) • Which molar absorptivity coefficient will you use to calculate the...
Name Part B. Iron un Chloride (FeCl) plus Potassium Thiocyanate (KSCN Prepare a stock solution to...
Name Part B. Iron un Chloride (FeCl) plus Potassium Thiocyanate (KSCN Prepare a stock solution to be tested by adding 12 drops each of 0.1 M FeCl, and 0.1 MKSON well. Fill each of four medium sized test tubes (all the same size) half full of the stock solution FeSCN'(a) pale yellow colorless 1. The first tube is a control. Always compare to this color. 2. Add 20 drops of 0.1 Miron () chloride solution to the second tube. Observe...
which reactant is limiting? which reactant is in excess? actual yield of NaCl, show the calculation...
which reactant is limiting?
which reactant is in excess?
actual yield of NaCl, show the calculation
percent yield of NaCl, show calculation
Data 50.00 g Mass of beaker: Mass of beaker and sample (NaHCO3): Mass of sample (NaHCO3): s1.00 g 49.57 g 49.57 g Mass of beaker and residue first heating: Mass of beaker and residue second heating: Mass of beaker and residue third heating (if required): Mass of residue: g 0.43 g mL Volume of concentrated HCl added: Calculations...
My question is #2 for the reaction Fe3+ (aq) + SCN- (aq)
FeSCN2+ (aq). The goal is to predict the color change (darker or
lighter) for test tubes 2-8. I have attached the supplemental
sheets given to help with the problem. The test tubes 2-8 are being
manipulated either by temperature or things being added which can
be seen by one of the pictures.
2. For reaction "UCTIONS are increased by the same amount. Fe3+ (aq) + SCN (aq) $...
Le Chatelier's Principle 3. For Part Ill, use Le Châteller's Principle to explain the colour changes observed in test tubes 2 and 3 upon the addition of HC and A . Also, explain the observed colour changes in the test tubes placed in hot and cold water. (4 marks) Test Tube 2: Test Tube 3: Hot Water bath: Cold Water bath: Extension: 1. NaCl(aq) + HCl(aq) = NaCl(aq) + H2O + Cl2(g) When the above system is cooled, gas bubbles...
how
do you show the derivation?
Show the deruaton of equation Peq Astd L std [FeNCS2.hq. A Х[FeNCS2.1.d(2) The conscentration of FeNcs FeNcsJ ) in he sandardc fouand by making assumption based on Le Chatelier's principle. The standard solution contains a very large concentration of Feyt aFe3、and small initial concentration of SCN-gon (The Fein the standard is 0mes morete in the trials) The high Fe foreces - ions. Therefore, for every one the reaction far to the nght, using up...
Fe3(aq) FESCN (aq) SCN (aq) In this experiment, we'll be examining the temperature-dependence of the rate constant for the reaction above. 1. Using the UV-Vis instrument, you measured a room temperature absorbance for FESCN2 at 477 nm of 0.815. What is its concentration in molarity (M)? Please show all work. The molar absorptivity for FeSCN2 is 4,258 м"сm1 a. Answer: b. You calculated the [FeSCN2] above from the observed room temperature absorbance. Which one of the following statements about the...
What's the concentration of [FeSCN2+] using limiting
reactant theory and equation?
For each test tube solution enter the initial concentration of Fe+ and SCNthe equilibrium concentration of FeSCN2: into the ICE table given. Complete entries for the rest of the table and calculate the K value for each of the tables. The values of K should be confined to a narrow range to reflect constancy. Comment on the quality of your work in this regard and calculate the average K....
I. Write the equilibrium constant expression, K for the following reaction Fe"(ag) FENCS(ag) SCN (ag) + CFENCS D 2. In part A of Experiment 34, it was assumed that all of the SCN added to the reaction mixture was converted to product (FeNCS). Which of the following best explains why that assumption was valid? A) The moles of Fe added equaled the moles of SCN- added. B) In part A, the SCN was the limiting reactant whereas in part B,...
the
guiding questions. the max absorbance is 460.
Guiding questions complex turque . Compare the molar absorptivity coefficients you obtained with SCN and Fe" as limiting reagents. Would you expect them to be the same? Why or why not? (Week 1) • The accepted molar absorptivity coefficient for FeSCN is 7.0x10' M'cm''. Find the bias and relative bias of your values and suggest possible sources of errors. (Week 1) • Which molar absorptivity coefficient will you use to calculate the...
Name Part B. Iron un Chloride (FeCl) plus Potassium Thiocyanate (KSCN Prepare a stock solution to be tested by adding 12 drops each of 0.1 M FeCl, and 0.1 MKSON well. Fill each of four medium sized test tubes (all the same size) half full of the stock solution FeSCN'(a) pale yellow colorless 1. The first tube is a control. Always compare to this color. 2. Add 20 drops of 0.1 Miron () chloride solution to the second tube. Observe...
which reactant is limiting?
which reactant is in excess?
actual yield of NaCl, show the calculation
percent yield of NaCl, show calculation
Data 50.00 g Mass of beaker: Mass of beaker and sample (NaHCO3): Mass of sample (NaHCO3): s1.00 g 49.57 g 49.57 g Mass of beaker and residue first heating: Mass of beaker and residue second heating: Mass of beaker and residue third heating (if required): Mass of residue: g 0.43 g mL Volume of concentrated HCl added: Calculations...
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