Question

Potassium benzoate (KC7H5O2) is another food preservative that inhibits the growth of mold, yeast and some bacteria. It is one of the products of the reaction between toluene, C7H8 and potassium permanganate, KMnO4.
C7H8(l) + 2KMnO4(aq) ➡️ KC7H5O2(aq) + 2MnO2(s) + KOH(aq) + H2O(l)

1.if 9.60g of c7H8 is reacted with excess KMnO4, what is the theoretical yield, in grams of kC7H5O2?

Answer 1

C₇H₈ = KC₇H₅O₂

92 g of C₇H₈ =160 g of KC₇H₅O₂

1g of C₇H₈ = 160/92 g of KC₇H₅O₂

9.6g of C₇H₈ =160 × 9.60 / 92 g KC₇H₅O₂

= 16.70g of KC₇H₅O₂