Potasa or Potassa: How To spell?
The word Potasa is misspelled against Potassa, a noun meaning "Potassium hydroxide, commonly called caustic potash."
Potassa has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings pota & a which should not be misspelled with single 'S'
Wrong Spelling:  pota-s-a  Correct Spelling:  pota-ss-a 
Find more incorrect spellings of Potassa to spell right way.