Question

Consider the reaction

A+2B⇌C

whose rate at 25 ∘C was measured using three different sets of initial concentrations as listed in the following table:

Calculate the initial rate for the formation of C at 25 ∘C, if
[A]=0.50*M* and [B]=0.075*M*.

Express your answer to two significant figures and include the appropriate units.

Trial | [A] ( M) |
[B] ( M) |
Rate ( M/s) |

1 | 0.35 | 0.010 | 1.5×10^{−3} |

2 | 0.35 | 0.020 | 2.9×10^{−3} |

3 | 0.70 | 0.010 | 5.9×10^{−3} |

Answer #1

**1st we need to find the arte law**

**Let the rate law be written as
rate = K [A]^x * [B]^y**

**consider trial 1 and trial 2 , here [A] is same.
[B] doubles and rate also doubles approximately
So y=1**

**consider trial 1 and trial 3 , here [B] is same.
[A] doubles and rate becomes 4 times approximately
So x=2**

**so,
above arte law becomes,
rate = K [A]^2 * [B]
put the values from trial 1 to find K
rate = K [A]^2 * [B]
1.5*10^-3 = K *(0.35)^2 * (0.01)
K = 1.22**

**SO rate law is
rate = 1.22 * [A]^2 * [B]**

**put [A] = 0.50 M and [B] = 0.075 M**

**rate = 1.22 * [A]^2 * [B]
= 1.22
* (0.5)^2 * (0.075)
=
0.023 M/s
Answer: 0.023 M/s**

Consider the reaction
A+2B⇌C
whose rate at 25 ∘C was measured using three different sets of
initial concentrations as listed in the following table:
Trial
[A]
(M)
[B]
(M)
Rate
(M/s)
1
0.15
0.010
2.7×10−4
2
0.15
0.020
5.4×10−4
3
0.30
0.010
1.1×10−3
Calculate the initial rate for the formation of C at 25 ∘C, if
[A]=0.50M and [B]=0.075M.
Express your answer to two significant figures and include the
appropriate units.

Constants | Periodic Table
Consider the reaction
A+2B⇌C
whose rate at 25 ∘C was measured using three different sets of
initial concentrations as listed in the following table:
Trial
[A]
(M)
[B]
(M)
Rate
(M/s)
1
0.50
0.050
1.5×10−2
2
0.50
0.100
3.0×10−2
3
1.00
0.050
6.0×10−2
Part a
Calculate the initial rate for the formation of C at 25 ∘C, if
[A]=0.50M and [B]=0.075M.
Express your answer to two significant figures and include the
appropriate units.
View Available Hint(s)...

For the reaction A+B+C→D+E, the initial reaction rate was
measured for various initial concentrations of reactants. The
following data were collected:
Trial
[A]
(M)
B]
(M)
[C]
(M)
Initial rate
(M/s)
1
0.30
0.30
0.30
9.0×10−5
2
0.30
0.30
0.90
2.7×10−4
3
0.60
0.30
0.30
3.6×10−4
4
0.60
0.60
0.30
3.6×10−4
rate=k[A]^m[B]^n
What is the value of the rate constant k for this reaction?
Express your answer to two significant figures and include the
appropriate units. Indicate the multiplication of...

For the reaction A+2B→2C, the rate of reaction is 1.82×10−5 Ms−1
at the time when [A]= 0.3585 M
a)What is the rate of formation of C?
b)What will [A] be 1.00 min later?
c)Assume the rate remains at 1.82×10−5 Ms−1 . How long would it
take for [A] to change from 0.3585 M to 0.3505 M ? Express your
answer using two significant figures

For the reaction A+B+C→D+E, the initial reaction rate was
measured for various initial concentrations of reactants. The
following data were collected:
Given the data calculated in Parts A, B, C, and D, determine the
initial rate for a reaction that starts with 0.45 M of
reagent A and 0.90 M of reagents B and C?
Trial
[A]
(M)
[B]
(M)
[C]
(M)
Initial rate
(M/s)
1
0.50
0.50
0.50
1.5×10−4
2
0.50
0.50
1.50
4.5×10−4
3
1.00
0.50
0.50
6.0×10−4...

determine the initial rate for a reaction that starts with 0.85
M of reagent A and 0.70 M of reagents B and C? Express your answer
to two significant figures and include the appropriate units.
Indicate the multiplication of units explicitly either with a
multiplication dot or a dash.
For the reaction A+B+C→D+E, the initial reaction rate was
measured for various initial concentrations of reactants. The
following data were collected:
Trial [A](M) [B](M) [C](M) Initial rate (M/s)
1 0.30 0.30...

Using the given data, determine the rate constant of this
reaction: A+2B ----> C+D
Trial
[A]
(M)
[B]
(M)
Rate (M/s)
1
0.320
0.300
0.0121
2
0.320
0.600
0.0121
3
0.640
0.300
0.0484

For the reaction A+B+C→D+E, the initial reaction rate was
measured for various initial concentrations of reactants. The
following data were collected:
Trial [A] (M) [B] (M) [C] (M) Initial rate (M/s)
1 0.30 0.30 0.30 9.0×10−5
2 0.30 0.30 0.90 2.7×10−4
3 0.60 0.30 0.30 3.6×10−4
4 0.60 0.60 0.30 3.6×10−4

For the reaction A+B+C→D+E, the initial reaction rate was measured
for various initial concentrations of reactants. The following data
were collected:
Trial
[A]
(M)
[B]
(M)
[C]
(M)
Initial Rate
(M/s)
1
0.10
0.10
0.10
3.0×10−5
2
0.10
0.10
0.30
9.0×10−5
3
0.20
0.10
0.10
1.2×10−4
4
0.20
0.20
0.10
1.2×10−4
Part A
What is the reaction order with respect to A?
Part B
What is the reaction order with respect to B?
Part C
What is the reaction order...

A Cu/Cu2+ concentration cell has a voltage of 0.23 V at 25 C.
The concentration of Cu2+ in one of the half-cells is
1.5×10-3 M. What is the concentration of Cu2+ in the
other half-cell? (Assume the concentration in the unknown cell to
be the lower of the two concentrations.) Express your
answer using two significant figures.

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