[cronosking]

Carminic acid, a naturally occurring pigment extracted from the cochineal insect contains only carbon hydrogen and oxygen. It was commonly used as a dye in the first half of the nineteen century. It is 53.66% C and 4.09% H by mass. A tritation required 18.02 ml of 0.0406 M NaOH to neutralize 0.3602 g carminic acid. Asuming that there is only one acidic hydrogen per molecule, what is the molecular formula of carminic acid?

Thanks!!!

[Sev]

Show your working.

Hint:  First, use the % (m/m) compositions to find the empirical formula.

[cronosking]

figured it out!

thanks anyway