Question

(b) Based on the quantity of 3-nitrophthalhydrazide from above (a) how many grams of sodium dithionite would you need to perform the synthesis of luminol assuming you need 1.3 equivalents of reducing agent in the reaction. Be sure to show your work. (5 pts)

Answer 1

Here we are using 1.3 equivalents of reducing agent.

To synthesize Luminol from 3-nitrophthalhydrazide sodium dithionite is is used as a reducing agent.

Molecular mass of sodium dithionite is 174.107 g/mol

No of moles = (grams of a substance / molecular mass)

Grams of sodium dithionite = No. of moles × molecular mass

= 1.3moles × 174.107 g/mol = 226.33 grams.

So we will need 226.33 grams of sodium dithionite to sythesize luminol.