Question

Answer questions #1-6 please

Observations and Interpretations to be Handed In For Activity: Observations and Interpretations 1) Balance the chromate / dichromate equilibrium equation: 2 Cro. (aq) + H(aq) + Cryo,'(aq) + H2O(1) (unbalanced equation) 2) What was the original color of the K,CrO solution? If the above equilibrium is established in the original solution, which species, Cro, (aq), or Cro" (aq) appears to be present in greatest amount? 3) What color did you observe after adding the 3M H2SO, solution? - Orange 4) What color did you observe after adding the IM NaOH solution? Yellow Color that it was before) 5) Assume that the dynamic equilibrium represented in the equation in 1 is present in the original solution you placed in the test tube. Based on LoChatelier's Principle, as stated above on page one, you will interpret the observations made in 2, above: (Note that H SO, produces H+ in solution.) a) When sulfuric acid was added, which reaction (forward or rose) was favored? What evidence The forward and reverse pate are equal in equilibrium present in the orio clier's Principle de in 2, above b) Assume that the system rapidly returns to equilibrium. At this new position of equilibrium, is there more or less Cro, present after the addition of the acid? Based on this, what happened to the amount of Cro?? Before answering the next question, consider this: Even before acid was added, the amounts of the two chromium ions were not equal. (Remember equilibrium means equal rates, not equal amounts.) c) If the amount of one of these ions increased and the amount of the other decreased, how is it that the rates of the forward and reverse reactions come to be equal again? (Hint: Assume the rate of the forward reaction is kr[H][ CrO ") and that of the reverse reaction is k[CrO'] 6) Based on LeChatelier's Principle, as stated above, you will interpret the observations made in 3. above: Note: NaOH produces OH- in solution. a) When sodium hydroxide was added, which reaction in 1 (forward or reverse) was favored? What evidence supports this? Why would this reaction be favored? (Hint: What does OH- do with H+?) b) Assume that the system rapidly returns to equilibrium. After the addition of the NaOH, at this new position of equilibrium, is there more or less CrO present? Based on this, what happened to the amount of Cro"?

Answer 1

kindly comment if any queries...Stay safe and keep HomeworkLibing...

The balanced equilibrum equation is. 20020 + 2HO > H₂O + Cr₂O7 2) The colour of K₂ choy is yellow. In this reaction there is predominantly Cr Oy ² ions present with a small amount of Cr2O72- consi on adding 3M Hason, the equilibrium will shift towards product side and more Cr ₂0, 2- ion is formed & the colour of solution become orange. According to le-chatelier principle ] on adding IM NaOH solution, the equulinum will shift backward 2- increases & the production of crou & solution become yellow Di chromate - chromate equilibrim 20 2-trong 2 hotarou - 15) (a) When Hy son was added forward reaction was favoured more to added, more the product is formed. (6) After addition of acid, if we brought the equilibaum, 220, 2-ion is more & the solution is Orange 1 (c) At equiliboum , rate of forward reaction become ernal to backward reaction'