You have determined a GC spectrum for your sample oil. You find 3 peaks. From determination of peak area, you find that the percent compositions represented by the peaks are: peak A is 66 percent , peak B is 22.66 percent, and peak C is 11.33 percent. The M. W. of your diene is 136 g/m. How many grams of Maleic Anhydride (M. W. 98 g/m) will you use to react with your 2.5g sample of crude diene?

1.19 g

Explanation:

Given that:

Molecular weight of diene 136 g/mol

Molecular weight of Maleic Anhydride 96 g/mol

Mass of crude diene = 2.5 g

Percent of Composition for Peak A = 66%

Percent of Composition for Peak B = 22.66%

Percent of Composition for Peak C = 11.33%

Let us determine the amount of diene in the sample;

So, using to represent the amount of diene; we have :

 =

 =

 = 1.65 g

Using the limiting reagent equation to determine the amount of Maleic Anhydride

=  

=

= 1.19 g

The  grams of Maleic Anhydride used to react with 2.5 g sample of crude diene = 1.19 g