Question
Alumina is purified away from aluminum salts containing this ion in the Bayer process. During saponification, this ion acts as a nucleophile at a carbonyl group to convert fats into soaps. Although this polyatomic ion precipitates most metals, at very high concentrations it re-solubilizes zinc and aluminum because it forms amphoteric salts. This naked ion reacts with carbon dioxide to form (*) bicarbonate. The equilibrium constant K-sub-b equals the molarity of this ion times “HB over B minus.” The sodium salt of this ion is sold as pellets called “caustic soda.” The concentration of this an·ion increases when ammonia is dissolved in water. For 10 points, all strong bases are salts of what polyatomic ion with formula “OH minus”? ■END■
ANSWER: hydroxide [or OH− until read; prompt on OH; reject “hydroxyl”]
<Adam Silverman, Science - Chemistry> ~25479~ <Editor: Adam Silverman>
= Average correct buzz position
Buzzes
Player | Team | Opponent | Buzz Position | Value |
---|---|---|---|---|
Jiaxu Liu | Detroit Country Day | Richard Montgomery | 33 | 20 |
Braden Booth | Dallas County | Detroit Catholic Central A | 91 | 10 |