Feroprussic or Ferroprussic: How To spell?
The word Feroprussic is misspelled against Ferroprussic, an adjective meaning "Ferrocyanic."
Ferroprussic has double "rr" is mispronounced as "r"Remember double 'RR' in between the strings fe & oprussic which should not be misspelled with single 'R'
Wrong Spelling:  fe-r-oprussic  Correct Spelling:  fe-rr-oprussic 
Check more misspelled words of Ferroprussic to spell it correct.