Question 14.2.1: For the decomposition of hydrogen peroxide in dilute sodium ......

General Chemistry [1096778]

For the decomposition of hydrogen peroxide in dilute sodium hydroxide at 20 °C,
2 H $_{2}$ O $_{2}$ (aq) → 2 H $_{2}$ O(ℓ) + O $_{2}$ (g)
the following data have been obtained:

What is the average rate of disappearance of H $_{2}$ O $_{2}$ over the period from 0 min to 434 min?

t (min)	[H $_{2}$ O $_{2}$ ] (mol/L)
0	0.0912
434	0.0566
868	0.0351
13.2	0.0218

Step-by-Step

The 'Blue Check Mark' means that this solution was answered by an expert.
Learn more on how do we answer questions.

You are asked to determine the average rate of disappearance of a reactant over a given period of time.
You are given the balanced chemical equation and data showing the reactant concentration as a function of time.
Average reaction rate is equal to the change in concentration over the change in time.

rate = $-\frac{\Delta \left[H_{2}O_{2}\right] }{\Delta t}=-\frac{\left(0.0566\text{ M}-0.0912 \text{ M}\right) }{\left(434\text{ min}-0\text{ min}\right) } =7.97\times 10^{-5}$ M/min

Related Answered Questions

Question: 14.4.7

Use half-life to calculate mass remaining for radioactive decay. The radioactive isotope ^32P has a half-life of 14.3 days. If a sample contains 0.884 g of ^32P, what mass of the isotope will remain after 22 days? ...

Verified Answer:

You are asked to determine the mass of a radioacti...

Question: 14.5.3

Use the Arrhenius equation to determine Ea. For the gas phase decomposition of ethyl chloroformate, the rate constant is 1.05 × 10^-3 s^-1 at 470 K and 1.11 × 10^-2 s^-1 at 508 K. ClCOOC2H5(g) → C2H5Cl(g) + CO2(g) Calculate the activation energy for this reaction. ...

Verified Answer:

You are asked to determine the activation energy f...

Question: 15.2.3

Manipulate equilibrium constant expressions. The equilibrium constant for the reaction of hydrogen with oxygen to form water is 5.7 × 10^40 at 25 ºC. H2(g) + ½ O2(g) ↔ H2O(g) K = 5.7 × 10^40 at 25 ºC Calculate the equilibrium constant for the following reactions. a. 2 H2(g) + O2(g) ↔ 2 H2O(g) ...

Verified Answer:

You are asked to calculate an equilibrium constant...

Question: 14.5.4

Use Arrhenius plot information to determine Ea. The rate of the following reaction was measured at different temperatures and rate constants were determined. N2O5(g) → 2 NO2(g) + ½ O2(g) Use these data to determine the activation energy for the reaction. ...

Verified Answer:

You are asked to determine the activation energy f...

Question: 14.4.4

Use the integrated rate law to calculate time for percent reacted. The isomerization of methyl isonitrile to acetonitrile in the gas phase at 250 ºC is first order (k = 3.00 × 10^-3 s^-1). CH3NC(g) → CH3CN(g) How much time is required for 90.0% of the CH3NC initially present in a reaction flask to ...

Verified Answer:

You are asked to calculate the amount of time requ...

Question: 14.4.5

Use the graphical method to determine reaction order and rate constant. Concentration versus time data have been collected for the decomposition of H2O2 at 300 K. H2O2(aq) → H2O(ℓ) + ½ O2(g) ...

Verified Answer:

You are asked to determine the order of a reaction...

Question: 14.4.6

Determine half-life, order, and k from concentration–time data. The following data were collected for the decomposition of sulfuryl chloride at 383 ºC. SO2Cl2 → SO2 + Cl2 ...

Verified Answer:

You are asked to calculate the half-life of the re...

Question: 14.5.2

The activation energy for the gas phase decomposition of t-butyl propionate is 164 kJ. C2H5COOC(CH3)3(g) → (CH3)2C=CH2(g) + C2H5COOH(g) The rate constant for this reaction is 3.80 × 10^-4 s^-1 at 528 K. What is the rate constant at 569 K? ...

Verified Answer:

You are asked to calculate the rate constant for a...

Question: 14.6.4

A kinetic study is done to investigate the following reaction: 2 H2(g) + 2 NO(g) → N2(g) + 2 H2O(g) A proposed mechanism is: Step 1. 2 NO(g) ↔ N2O2(g) Fast in both directions Step 2. N2O2(g) + H2(g) → N2O(g) + H2O(g) Slow Step 3. N2O(g) + H2(g) → N2(g) + H2O(g) Fast a. Does this mechanism account ...

Verified Answer:

You are asked to determine whether a given mechani...

Question: 14.6.2

Chlorofluorocarbons break down in the upper atmosphere to form, among other products, chlorine atoms. The chlorine atoms are involved in the breakdown of ozone via the following mechanism. Step 1. Cl(g) + O3(g) → ClO(g) + O2(g) Step 2. ClO(g) + O3(g) → Cl(g) + 2 O2(g) a. Identify the molecularity ...

Verified Answer:

You are asked to identify the molecularity of the ...