KBr(aq) + NaCl(aq) =

Determine the rate law and the value of k for the following reaction using the data provided.

blsea [12.9K]

Answer: The rate law expression is $\text{Rate}=k[NO]^2[O_2]^1$ and value of 'k' is $1.727\times 10^3M^{-2}s^{-1}$

Explanation:

Rate law is defined as the expression which expresses the rate of the reaction in terms of molar concentration of the reactants with each term raised to the power their stoichiometric coefficient of that reactant in the balanced chemical equation.

For the given chemical equation:

$2NO(g)+O_2(g)\rightarrow 2NO_2(g)$

Rate law expression for the reaction:

$\text{Rate}=k[NO]^a[O_2]^b$

where,

a = order with respect to nitrogen monoxide

b = order with respect to oxygen

Expression for rate law for first observation:

$8.55\times 10^{-3}=k(0.030)^a(0.0055)^b$ ....(1)

Expression for rate law for second observation:

$1.71\times 10^{-2}=k(0.030)^a(0.0110)^b$ ....(2)

Expression for rate law for third observation:

$3.42\times 10^{-2}=k(0.060)^a(0.0055)^b$ ....(3)

Dividing 1 from 2, we get:

$\frac{1.71\times 10^{-2}}{8.55\times 10^{-3}}=\frac{(0.030)^a(0.0110)^b}{(0.030)^a(0.0055)^b}\\\\2=2^b\\b=1$

Dividing 1 from 3, we get:

$\frac{3.42\times 10^{-2}}{8.55\times 10^{-3}}=\frac{(0.060)^a(0.0055)^b}{(0.030)^a(0.0055)^b}\\\\2^2=2^a\\a=2$

Thus, the rate law becomes:

$\text{Rate}=k[NO]^2[O_2]^1$

Now, calculating the value of 'k' by using any expression.

Putting values in equation 1, we get:

$8.55\times 10^{-3}=k[0.030]^2[0.0055]^1\\\\k=1.727\times 10^3M^{-2}s^{-1}$

Hence, the rate law expression is $\text{Rate}=k[NO]^2[O_2]^1$ and value of 'k' is $1.727\times 10^3M^{-2}s^{-1}$

4 0

3 years ago

HELPPPP ASAP!!! Plzzz

Ad libitum [116K]

Answer:

420 miles

Explanation:

From the question given above, the following data were obtained:

Time = 3.5 hours

Speed = 120 mi/h

Distance =?

Speed is defined as the distance travelled per unit time. Mathematically, it is expressed as:

Speed = distance / time

With the above formula, we can obtain the distance travelled by the plane as follow:

Time = 3.5 hours

Speed = 120 mi/h

Distance =?

Speed = distance / time

120 = distance / 3.5

Cross multiply

Distance = 120 × 3.5

Distance = 420 miles

Thus, the distance travelled by the plane is 420 miles

6 0

2 years ago

Anyone need sugar daddy

Ber [7]

Answer:

EEEE

Explanation:EEE

4 0

2 years ago

Read 2 more answers

What are the units for the volume of a solid volume of a liquid

Ugo [173]

Answer:Volume is the quantity of three-dimensional space enclosed by a closed surface, for example, the space that a substance (solid, liquid, gas, or plasma) or shape occupies or contains.

Explanation:

7 0

3 years ago

If you connect a solid piece of copper with a solid piece of zink using only a wire electrons will flow from the zinc to the cop

vladimir2022 [97]

False

Explanation:

This is false because there is no solution and salt bridge to facilitate the movement of electrons from the two metals.

This connection is not an electrochemical cell because other components are absent. To fully form the electochemical cell which allows a potential difference to be set up;

Presence of electrodes
Presence of a solution
Wire
Salt bridge

Just wires and the electrodes are given in this set up and it will not work.

Learn more:

Electrolyte brainly.com/question/4609389

#learnwithBrainly

3 0

2 years ago