ELCS EXAM 2 QUESTIONS AND ANSWERS 2025
ELCS EXAM 2 QUESTIONS AND ANSWERS 2025 1. What are some ways to modify a tray if it does not fit?: wax or heat 2. What should you do if your impressions are dry and you need to separate them?: soak in water first, then pry apart 3. The contraction of a gel accompanied by the separating out of liquid: Syneresis 4. Having the property of adsorbing water from the environment: Hygroscop ic/imbibition 5. Disadvantages to alginate?: Alginate can distort easily • Syneresis • Hygroscopic/imbibition • Alginate does not capture much detail 6. Advantages to alginate?: • Alginate is cheap • Alginate is easy to use • Hydrophilic 7. How does the reaction between Alginate and water work?: On mixing the powder with water, a sol is formed. A chemical reaction takes place, and a gel is formed. Here, sodium alginate reacts with calcium sulfate, resulting in sodium sulfate and calcium alginate 8. Alginate is an ___________ ___________: irreversible hydrocolloid.
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