Question
This material is primarily made of frustules that had fossilized after settling at the endpoint of the biological pump. For 10 points each:
[10m] Name this material that, alongside activated carbon, acts as the most common base for filter cakes. This material stabilizes nitroglycerin in the initial formulation for dynamite.
ANSWER: diatomaceous earth [accept diatomite or celite or kieselguhr]
[10e] As it is made of the cell walls of diatoms, diatomaceous earth is primarily composed of this compound. Quartz, sand, and glass are all composed primarily of this compound.
ANSWER: silica [or silicon dioxide or SiO2]
[10h] Diatomaceous earth is combined with nickel ions to form one of these materials called Ni–kieselguhr (“N-I–KEE-zuhl-goor”). An active metal is dissolved and absorbed by pores in these materials during incipient wetness impregnation.
ANSWER: catalyst supports [accept supported catalysts; accept carriers or solid supports; prompt on catalysts or heterogeneous catalysts]
<Chemistry>
Summary
| 2025 ACF Nationals | 04/19/2025 | Y | 1 | 20.00 | 100% | 100% | 0% |
Data
| Columbia A | Minnesota | 10 | 10 | 0 | 20 |