ZuoTi.Pro
Question

Hi there

Im having trouble with the last question on my lab report sheet. Would both equations be considered correct because they share the common ion effect? Please explain; thank you in advance!!

Section E: Thiocyano-iron III Complex Ion: Fe + SCN = FeSCN2+ Yellow red Stress to system Observation Shift CIE or Chem Rx Ad

science   chemistry   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

Both equations are possible, but equation a. Fe^3+ + SCN^- <==> Fe(SCN)^2+ is belived to be right.

In the given test conditions we have added 1:1 ratio (0.5 mL of 0.1 M each Fe^3+ and SCN^- ions) and color of the solution is red, this means equation Fe^3+ + SCN^- <==> Fe(SCN)^2+ is more feasible than other. If equation b. Fe^3+ + 3SCN^- <==> Fe(SCN)3 is correct then it should leave some Fe^3+ ions in the solution due to stochiometric relationship and we will observe a precipitate (Fe(SCN)3) at bottom of the test tube leaving some amount of supernatant above the precipitate (supernatant has Fe^3+ ions). If stable Fe(SCN)3 formed we can check a quick test for Fe^3+ ions in solution. The Fe(SCN)^2+ complex ions that absorb blue light and appears as a deep red color and this can be further confirmed by colorimetry.

The formation of complex Fe(SCN)^2+ is further supported by data from stress to the system (add 0.2 M Fe(NO3)3 data) adding more Fe^3+ ions, still it showed dark red color - hence equation a. Fe^3+ + SCN^- <==> Fe(SCN)^2+ is a valid statement.

Hope this helped you!

Thank You So Much!

Please Rate this answer as you wish.("Thumbs Up")

0 0
Add a comment
Know the answer?
Add Answer to:
Hi there Im having trouble with the last question on my lab report sheet. Would both...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • Iron thiocyanate (FeSCN2+) is a complex ion that appears orange-red in solution. Iron(III) (Fe3+) and thiocyanate...

    Iron thiocyanate (FeSCN2+) is a complex ion that appears orange-red in solution. Iron(III) (Fe3+) and thiocyanate (SCN-) are both colorless in solution. FeSCN2+ (aq) --(equilibrium)-- Fe3+ (aq) + SCN- (aq) a) If you add Fe(NO3)3 to a solution of these ions at equilibrium, in which direction will the reaction run to reach a new equilibrium? b) Silver ions react with thiocyanate ions to form a white precipitate. If you add silver ions to a solution of these ions at equilibrium,...

  • prelab /postlab all questions please Questions 1. For the reaction at 20°C, NH3(aq) + H+ (aq)...

    prelab /postlab all questions please Questions 1. For the reaction at 20°C, NH3(aq) + H+ (aq) NH4(aq), the equilibrium constant is calculated to be K = to 4.5 x10%. CHAT] A. Write the Equilibrium expression for this reaction. Keq = ỞNH TH] B. From the size of the number for Keq, does the equilibrium lie to the left or to the right? Right 2. If the reaction between iron(III) ion and thiocyanate ion, Fe3+ (aq) + SCN (aq) → FeSCN2+(aq),...

  • 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) $...

  • 2.When concentrated H2SO4 (18M) is added to a saturated solution of sodium sulfate, a white precipitate...

    2.When concentrated H2SO4 (18M) is added to a saturated solution of sodium sulfate, a white precipitate is formed. Write a net-ionic equation for the equilibrium in saturated sodium sulfate, and explain the change in terms of Le Chatelier’s principle. 3.A solution contains the blood-red hexathiocyanatoferrate(III) complex ion, Fe(SCN)63-, in equilibrium with the iron(III) ion, Fe3+, and six thiocyanate ions, SCN-. If the solution is diluted with water, will the color deepen, fade, or stay the same? Why? In addition to...

  • Introduction to Equilibrium Lab report Please help answering the question #2 (a,b,c,d) Thanks! ...

    Introduction to Equilibrium Lab report Please help answering the question #2 (a,b,c,d) Thanks! Question Procedure Notebook Complex ion equilibrium 1. Formation of the complex ion: 38 a) What evidence was there that a new chemical substance had formed? b) How did the reaction change the initial iron and thiocyanate concentrations? Would the reacon av tken place ifthe proportions hadtbenhioneric raior? 2. Adding and removing reactants: a) What effecet did adding the reactants (Fe' or SCN-) have on he briumcmposition? evidence...

  • In this step, you add xSCN to oneof the our escoi y a. If your solution has Fe", s te portions fr...

    second photo is for your reference. thanks! In this step, you add xSCN to oneof the our escoi y a. If your solution has Fe", s te portions from Step 12A. ,what change should you expect to observe? b. Write a balanced chemical equation for the reaction between Fe" and KSCH. equation Step 13 In this step, you first add Naf to one of the four decantate portions NH&SCN in ethanol. from Step 12A; then, you add a. If your...

  • Fe (aq)SCN-(aq) FeSCN (aq) thiocyanate iron(II) thiocyanoiron(il) Introduction When the reactants shown above, are combined, chemical...

    Fe (aq)SCN-(aq) FeSCN (aq) thiocyanate iron(II) thiocyanoiron(il) Introduction When the reactants shown above, are combined, chemical equilibrium is reached rapidly. Once equilibrium is established, the equilibrium constant can be calculated if the concentration of all the ions are known: [FeSCNP.he [SCN-... and (Feng Your task is to prepare three different equilibrium systems that contain different concentrations of these ions. Keep in mind that although the concentrations will be different, the value of the equilibrium constant Ke will be indeed constant...

  • Lab Report: Determination of Kc for a Complex Ion Formation tube 2.00e-3 Fe3+ (mL) 2.00E-3M SCN-...

    Lab Report: Determination of Kc for a Complex Ion Formation tube 2.00e-3 Fe3+ (mL) 2.00E-3M SCN- (mL) water (mL) initial conc. Fe3+ initial conc. SCN- 1 5.00 5.00 0 1.00e-3M 1.00E-3M 2 5.00 4.00 1.00 1.00E-3M 8.00E-3M 3 5.00 3.00 2.00 1.00E-3, 6.00E-3M 4 5.00 2.00 3.00 1.00E-3M 4.00E-3M 5 5.00 1.00 4.00 1.00E-3M 2.00E-3M 10ml of 0.200M Fe3+, 2.00ml of 0.00200M SCN-, AND 8.00ml of water results in an eq. [FeSCN2+] IN Standard Soln.:2.00E-4M Could you please explain how...

  • 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...

  • I need help with these questions. Part I.A 1. Why did the indicator initially turn blue...

    I need help with these questions. Part I.A 1. Why did the indicator initially turn blue when NaOH was added to flask A? Consider equilibrium: Hin + H2O + H2O + In [1 mark] 2. When you left the flask A to stand for several minutes after the addition of NaOH, why did the contents of the flask A slowly change colour back from blue to yellow? Consider equilibriums: Hin + H2O + H30+ + In [2 marks] CO2(g) +...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT