I need help with parts B,C,and D please The reactant concentration in a zero-ord

Question

I need help with parts B,C,and D please

The reactant concentration in a zero-order reaction was g.00x10 2 Mafter 190 s and 2.50x10 2 Mafter 400 s What is the rate constant for this reaction? Express your answer with the appropriate units. Indicate the multiplication of units, as necessary, explicitly either with a multiplication dot or a dash. Koth -4 M 3.10x10 Submit Hints My Answers Give Up Review Part Correct Part B What was the initial reactant concentration for the reaction described in Part A? Express your answer with the appropriate units. Indicate the multiplication of units, as necessary, explicitly either with a multiplication dot or a dash. Alo Value Units

Explanation / Answer

(B)

Zero order integrated rate constant equation,

[A]t = [A]0 - kt

at, 190s => 9.00 * 10-2 = [A]0 - 3.10*10-4(190)

[A]0 = 0.149 M

(C)

For First order reaction,

ln[A]t = - kt + ln[A]0

At 35.0 s => ln(5.90*10-2) = - k (35.0) + ln[A]0 ---------- (1)

At 85.0 s = > ln(3.30 * 10-3) = - k(85.0) + ln[A]0 -------- (2)

(1) - (2)

ln(0.0590/0.00330) = - k (35.0 - 85.0)

k = 0.0577 s-1

(D)

For second order reaction,

1/[A]t = kt + 1/[A]0

at, 195 s => 1/0.360 = k(195) + 1/[A]0    ------------ (1)

At, 830 s = > 1 / 0.0770 = k (830) + 1/[A]0 ------- (2)

do (1) - (2)

(1/0.360) - (1/0.0770) = k (195 - 830)

k = 0.0161 M-1.s-1.

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

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