QUESTIONS AND ANSWERS | 100%
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Separations are needed for both qualitative and quantitative analysis of
mixtures - 🧠 ANSWER ✔✔True
Another term to describe precipitation separations is... - 🧠 ANSWER
✔✔crystallization
Chemistry separations using precipitation are based on differences in.... - 🧠
ANSWER ✔✔Solubility
Separations can be used to remove impurities - 🧠 ANSWER ✔✔True
, Separations using distillation are based on differences in - 🧠 ANSWER
✔✔boiling points
What is an extraction? - 🧠 ANSWER ✔✔The transfer of a solute between
two immiscible liquids, or from one phase to another.
Why are separations important in chemistry? - 🧠 ANSWER ✔✔1.
Separations are often essential for analysis of mixtures.
2. Synthesis often requires a purification step based on separations.
3. Often it is necessary to isolate pure compounds.
Which GC detector works well for hydrocarbon analysis? - 🧠 ANSWER
✔✔Flame Ionization Detector (FID)
Which detector is universal for detecting any analyte? - 🧠 ANSWER
✔✔Thermal Conductivity Detector (TCD)
Which of the following has a gas as the mobile phase?
HPLC, TLC, LC, or GC - 🧠 ANSWER ✔✔GC
What GC detector works great with low levels of chlorinated compounds? -
🧠 ANSWER ✔✔Electron Capture Detector (ECD)