Consider the reaction: 2 H2O2(aq) 2 H2O(l) + O2(g) The graph below shows the con

Question

Consider the reaction:
2 H2O2(aq) 2 H2O(l) + O2(g)
The graph below shows the concentration of H2O2 as a function of time.

Use the graph to calculate each quantity. (Enter your answers to at least three significant figures.)
(a) The average rate of the reaction between 10 and 20 s.

___________ M/s

(b) The instantaneous rate of the reaction at 30 s.

___________M/s

(c) The instantaneous rate of formation of O2 at 50 s.

____________M/s

(d) If the initial volume of the H2O2 is 2.5 L, what total amount of O2 (in moles) is formed in the first 20 s of reaction?

____________ mol

Explanation / Answer

For the given reaction

The graph shown above

(a) average rate of reaction between 10 s and 20 s

= (-(0.55 - 0.75)/10

= 0.02 M/s

(b) Instantabeous rate at 30 s

= 0.4/30

= 0.013 M/s

(c) instantabeous rate of formation of O2 at 50 s

= 0.22/2 x 50

= 0.0022 M/s

(d) moles of H2O2 = 2.5 L/22.4 L = 0.11 mol

moles of H2O2 reacted at 20 s = 0.11 x 0.55

moles of O2 formed = 0.11 x 0.55/2 = 0.03025 mol

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

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