Chemistry Practice Problems Average Rate of Reaction Practice Problems Solution: Consider the following hypothetical aqueous reacti...

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Solution: Consider the following hypothetical aqueous reaction:  A(aq) → B(aq). A flask is charged with 0.065 mol of A in a total volume of 100.0 mL. The following data are collected. Calculate the number of moles of  B at 10 min, assuming that there are no molecules of B at time zero.Time (min)010203040Moles of A0.0650.0510.0420.0360.031

Problem
Consider the following hypothetical aqueous reaction:  A(aq) → B(aq). A flask is charged with 0.065 mol of A in a total volume of 100.0 mL. The following data are collected. Calculate the number of moles of  B at 10 min, assuming that there are no molecules of B at time zero.
Time (min)
0
10
20
30
40
Moles of A
0.065
0.051
0.042
0.036
0.031
Solution

We are given the following general reaction for  a reaction wherein a flask is charged with 0.065 mol of A in a total volume of 100.0 mL:

A(aq) → B(aq)

We are asked to calculate the number of moles of B at 10 minutes assuming it is zero initially and given the data for the number of moles of A at different times:

Time (min)
0
10
20
30
40
Moles of A
0.065
0.051
0.042
0.036
0.031
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