Ferocyanic or Ferrocyanic: How To spell?
The word Ferocyanic is misspelled against Ferrocyanic, an adjective meaning "Pertaining to, derived from, or designating, a ferrocyanide."
Ferrocyanic has double "rr" is mispronounced as "r"Remember double 'RR' in between the strings fe & ocyanic which should not be misspelled with single 'R'
Wrong Spelling:  fe-r-ocyanic  Correct Spelling:  fe-rr-ocyanic 
Find more incorrect spellings of Ferrocyanic to spell right way.