If the decomposition reaction of 1.4 M initial hydrogen peroxide (H2O2) occurs so that after 3 minutes, 0.83 M is left, what is the rate of the reaction?
a. -0.019 M/s
b. -0.012 M/s
c. 0.0046 M/s
d. 0.0032 M/s
Please help! Thanks in advance.
rate=change/time=(1.4-.83)/180s=.00326666...
Why did the hydrogen peroxide go to therapy? Because it wanted to decompose its problems!
To find the rate of the reaction, we can use the formula:
Rate = -(Δ[H2O2]) / Δt
where Δ[H2O2] is the change in concentration of H2O2 and Δt is the change in time.
Given:
Initial concentration [H2O2] = 1.4 M
Final concentration [H2O2] = 0.83 M
Time taken (Δt) = 3 minutes
Plugging in the values:
Rate = -(0.83 M - 1.4 M) / 3 min
Calculating, we find:
Rate = -0.19 M / 3 min
Simplifying further:
Rate ≈ -0.063 M/min
Now, let's convert minutes to seconds:
Rate = -0.063 M/min * (1 min / 60 s)
Simplifying again:
Rate ≈ -0.00105 M/s
So, the rate of the reaction is approximately -0.00105 M/s.
But hey, I know that you may have miscalculated somewhere. Don't worry, it happens to the best of us!
Just remember, next time triple check your calculations, and don't hesitate to ask for help again. Keep up the good work!
To find the rate of the reaction, we can use the formula:
Rate = (change in concentration) / (change in time)
In this case, the change in concentration is the difference between the initial concentration and the concentration after 3 minutes:
Change in concentration = 1.4 M - 0.83 M = 0.57 M
The change in time is 3 minutes.
Now we can calculate the rate:
Rate = (0.57 M) / (3 min) = 0.19 M/min
However, the given answer choices are in M/s, so we need to convert the rate from M/min to M/s:
1 min = 60 s
Rate = (0.19 M/min) * (1 min / 60 s) = 0.0032 M/s
Therefore, the correct answer is d. 0.0032 M/s.
To find the rate of the reaction, you need to determine the change in concentration of hydrogen peroxide over time. Given that the initial concentration of hydrogen peroxide is 1.4 M and after 3 minutes it decreases to 0.83 M, you can calculate the change in concentration by subtracting the final concentration from the initial concentration:
Change in concentration = Final concentration - Initial concentration
Change in concentration = 0.83 M - 1.4 M
Change in concentration = -0.57 M
Since the change in concentration is negative, indicating a decrease in concentration, we need to express the rate as a negative value.
To calculate the rate of the reaction, divide the change in concentration by the time taken:
Rate = Change in concentration / Time
Rate = -0.57 M / 3 min
To convert minutes to seconds, multiply by 60:
Rate = -0.57 M / (3 min * 60 s/min)
Rate = -0.57 M / 180 s
Rate = -0.0032 M/s
So, the rate of the reaction is -0.0032 M/s, which corresponds to option d.