1. Dihydrogen Phosphate   ClO   H2PO4   O2   C2H3O2   Hint Half-n-half Clue   2. Dichromate (Cr2O7)   H2PO4   Cr2O7   MnO4   S2O3   Half-n-half Clue   3. Chlorite   ClO2   SCN   IO3   MnO4   Half-n-half Clue   4. Bromate   C2H3O2   O2   BrO3   H2PO4   Half-n-half Clue   5. Cyanate   CNO   ClO3   BrO4   ClO2   Half-n-half Clue   6. Chlorate   ClO3   CN   IO3   IO   Half-n-half Clue   7. Thiosulfate (S2O3)   HPO4   S2O3   BrO   IO2   Half-n-half Clue