Question

Can someone help me solve this ??

Answer 1

The mass of ASA in the tablet is 145 mg.

Explanation:

Step 1. Calculate the mass of ASA in the final solution

`"1 ppm" = "1 mg"/(10^6color(white)(l) "mg") = "1 mg"/"1000 g" = "1 mg/kg" = "1 mg/L"`

`"Mass of ASA" = "0.075 00" color(red)(cancel(color(black)("L"))) × "92.9 mg ASA"/(1 color(red)(cancel(color(black)("L")))) = "6.968 mg ASA"`

The mass of ASA in the aliquot is 6.968 mg.

Step 2. Calculate the mass of ASA in the initial solution

The volume of the original solution was 125.0 mL.

You used only 6.00 mL of this solution.

The original solution contained

`"6.968 mg ASA" × (125.0 color(red)(cancel(color(black)("mL"))))/(6.00 color(red)(cancel(color(black)("mL")))) = "145 mg ASA"`

The mass of ASA in the tablet is 145 mg.