| Hint | Answer | % Correct |
|---|---|---|
| SO₄²- | Sulfate | 90%
|
| NH₄+ | Ammonium | 80%
|
| OH- | Hydroxide | 75%
|
| NO₃- | Nitrate | 70%
|
| CO₃²- | Carbonate | 65%
|
| NO₂- | Nitrite | 65%
|
| SO₃²- | Sulfite | 65%
|
| CN- | Cyanide | 55%
|
| PO₄³- | Phosphate | 55%
|
| CLO₃- | Chlorate | 50%
|
| CrO₄²- | Chromate | 50%
|
| C₂H₃O₂- | Acetate | 45%
|
| CLO₂- | Chlorite | 40%
|
| Cr₂O₇²- | Dichromate | 35%
|
| CLO₄- | Perchlorate | 35%
|
| O₂²- | Peroxide | 35%
|
| HCO₃- | Hydrogen Carbonate | 25%
|
| HSO₄- | Hydrogen Sulfate | 25%
|
| CLO- | Hypochlorite | 25%
|
| MnO₄- | Permanganate | 25%
|
| H₂PO₄- | Dihydrogen Phosphate | 20%
|
| HPO₄²- | Hydrogen Phosphate | 20%
|
| C₂O₄²- | Oxalate | 20%
|
| NCS- or SCN- | Thiocyanate | 20%
|
| S₂O₃²- | Thiosulfate | 15%
|
| Hg₂²+ | Mercury(I) | 10%
|