DATA The Effect of Concentration 1. Record the color of each solution at each st

Question

DATA The Effect of Concentration 1. Record the color of each solution at each step Test Tube # | Test Tube # | Test Tube # | Test Tube # CrO 2 Initial Color CrO42 and Species Grees/Y'ellewrne Cr20,2. Cr20,2 Orange Green Yellow Orange Color and Cro Species after 5 drops of HCl Cr20,2 NA NA HCL HCL Light Orange Orange Color and Species after 5 drops of NaOH NA NA CrO 2 Cr20,2 NaOH NaOH No Change Yellow Color and Cr20, NA NA NA Species after 10 drops of c NaOH Yellow Color and NA Species after 10 drops of HCI NA Cro2 NA HCL Light Orange 3. Do the color changes indicate that a physical or a chemical change has occurred? Explain.

Explanation / Answer

Solution #1 the reaction is exothermic as after product formation heat in ejected.

Solution#2 the reaction is endothermic as heat is needed to convey the reaction.

For exothermic reaction colour is intenseddue to high absorptivity coefficient value whereas for endothermic reaction it is reversed.

Related Questions

Navigate

• Browse (All)
• Browse D
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.