7,8,9 please show you came to the answer 7. Consider a chemical reaction involvi

Question

7,8,9 please show you came to the answer

7. Consider a chemical reaction involving compounds A and B, which is found to be first order in A and second order in B. Given the information below, calculate the numerical value of the specific rate constant? MTrial Initial AL 1.0 2.0 natia at a Rate Ms 0.10 Initial B 0.20 8. Calculate the rate for Trial 2 in the above problem .Calcatethe rate for Trial 2 in the abave problem 9. What are the units of the specific rate constant for the reaction described in the previous problem pA-

Explanation / Answer

As we know,

Rate = k [Reactant 1] a * [Reactant 2] b

Rate = k [A]a [B]b

According to the given data for the reaction,

a=1 & b=2

Rate = k [A] [B]2

For trial 1,

Rate1 = k [1.0 M] [0.20 M]2 = 0.1 Ms-1 (Equation 1)

For trial 2,

Rate2 = k [2.0 M] [0.60 M]2 = ??? (Equation 2)

According to the equation 1,

0.1 Ms-1 = k [1.0 M] [0.20 M]2 (Where k = Rate Constant)

k = 0.1 Ms-1 / (1.0 M * 0.04 M2 )

k = 2.5 M-2 s-1

From equations 1 & 2,

eq.1/eq.2

( 0.1 Ms-1 = k [1.0 M] [0.20 M]2 ) / ( Rate2 = k [2.0 M] [0.60 M]2 )

Rate2 = ( 2.0 * 0.602 * 0.1 ) / ( 1.0 * 0.22 )

Rate for trial 2 = 1.8 Ms-1

Units of the specific rate constant = M-2s-1 or   mol-2 dm6 s-1

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