Chemisty 152 Part II: Absorbance of initial solution (A Modern Experimental Chem

Question

Chemisty 152 Part II: Absorbance of initial solution (A Modern Experimental Chemistry 1 132 kc total acetic acid added de to constant colorof Acor HB- solution 5 2.03 4.00 mL Average Kell value: 3.32×10-5 I.I Questions: 1. Does the addition of KCI have a significant effect on absorption at max by BCG? Yes or no? 2. Based on the description of the effects of inert ions above, what effect on absorption would you expect if you replaced KCI with NaCI? 3. What effect on absorption would you expect if you substituted HCI for KC1? 4. Is Kc for BCG-Kargreater or smaller than Kc for BCG + 140? rerkr tan 5. If the calculated K,-0.99 for two solutions (I and II) of BCG, with solution II containing KCI, what does this tell you about the KCI concentration of solution I1?

Explanation / Answer

From the given data,

1. Addition of KCl had effect on absorbance : yes

2. If we replaced KCl with NaCl, we would not see any change in the absorbance. Both are strong electroytes.

3. If HCl is substiuent in place of KCl, the absorbance of solution would drastically decrease as HB- concentration in solution would increase.

4. greater

5. KCl concentration in solution II is lower than that in solution I, givign a Kf value of 0.99.

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

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