Question
A triangular arrow engraved into the lip of these objects indicates the direction they should be inserted to make the path length one centimeter. For 10 points each:
[10m] Name these small rectangular vials that hold solutions of unknown concentration inside a spectrophotometer.
ANSWER: cuvettes
[10e] Spectrophotometry is also used to measure the concentration of the suspended, insoluble particles found in these mixtures. This class of mixtures include emulsions, gels, and aerosols.
ANSWER: colloids [prompt on suspensions]
[10h] Particle concentration in a colloid is reported using this quantity to account for both absorbed and scattered light. This quantity is measured at 600 nanometers to estimate the concentration of cells in broth.
ANSWER: optical density [or OD; or OD600; prompt on density]
<Adam Silverman, Science - Chemistry> ~20759~ <Editor: Adam Silverman>
Summary
| 2023 PACE NSC | 06/10/2023 | Y | 1 | 20.00 | 100% | 100% | 0% |
Data
| Detroit Catholic Central A | Thomas Jefferson B | 10 | 10 | 0 | 20 |