Recrystallization - Study guides, Class notes & Summaries

DSST Test Questions The ability of a mineral to resist scratching is called - hardness The breaking of a mineral along definite planes is called - cleavage The two most abundant elements in the earth's crust are - oxygen and silicon Which of the following internal crystalline structure of minerals does not have three axes at right angles to one another? - monoclinic Ore minerals contain - a useful metal or nonmetal that is easily extracted The two most important identifying c...

What happens when insects get cold? correct answers 1st threshold: chilling injury, certain cellular processes aren't working well 2nd threshold: Supercooling point (freezing point) Chill coma correct answers reversible state of paralysis Supercooling point correct answers freezing point What are some examples of chilling injury? correct answers loss of membrane fluidity, loss of ion homeostasis, and apoptosis What happens when water freezes in a cell? correct answers expands and...

A-Level Chemistry PAG 6: Synthesis Of An Organic Solid Questions And Answers | Latest Version | Graded A+ **Question:** What are the necessary equipment and materials for the synthesis of benzoic acid via reflux and recrystallization? **Answer:** Required equipment includes: - Measuring cylinder (10 cm3) - Dropping pipettes - Quickfit apparatus: pear-shaped or round-bottom flask, Liebig condenser and tubing - 250 cm3 beaker - Glass rod - Anti-bumping granules - Apparatus for fil...

In the experiment, you added water to the reaction vessel after the reaction was complete, but we did not discuss why. Based on what happened after adding the water, which of the following is the reason for the addition of water? a) lower the solubility of the product in solution so it precipitated out b) increase the solubility of the product in solution so it precipitated out c) lower the solubility of the product in solution so it stayed in solution d) increase the solubility of the pr...

The viscosity of a fluid _______. correct answersrelates an applied SHEAR stress to the velocity gradient in the fluid Which of the following is NOT related to recrystallization? Cold working Hot working Melting temperature Elastic modulus correct answersElastic modulus At room temperature a plain carbon steel containing 0.2 weight percent carbon is: Hypereutectoid Ferromagnetic Highly alloyed Brittle correct answersFerromagnetic A semiconductor with donor impurities _____. ...

CRSS 3060 EXAM 1 WITH COMPLETE SOLUTIONS Hydrolysis - Answer- a chemical decomposition reaction in which a chemical bond is split and the elements contained in water are added Hydration - Answer- A mineral weathering process wherein water molecules combine with soil constituents Igneous rock - Answer- a rock that formed by the cooling and solidification of liquid parts of the lithosphere Loess - Answer- deposit of windblown soil particles, largely silt size metamorphic rock - Ans...

Purification techniques (discussed so far) - correct answers Extraction Recrystallization Simple/fractional distillation Analysis techniques (discussed so far) - correct answers Mp NMR TLC When to use extraction - correct answers Want to separate compounds based on solubility and density gradient, and you have two immiscible liquids. Why could hexane be used in an extraction with water, but not acetone? - correct answers Acetone is water soluble and hexane isn't; extraction require...

MAE 272 Exam 3 Review Questions & Answers 2024/2025 During polymerization thermosetting plastics are going through a process: - ANSWERSCalled cross-link curling and Which is irreversible Friction should be eliminated, or at least minimized in manufacturing processes except during: - ANSWERSAll answers are correct (flat and profile rolling, roll forging, solid-state friction welding, ring rolling) Comparing to steels, Kevlar 29 - ANSWERSHas higher specific strength During forming an...

Quenching correct answers What is rapid cooling after heat treating called? Tension correct answers Ceramics are strong in compression but weak in ____? Aviation correct answers Where are most Titanium alloys used? Slip Cast correct answers Ceramics are typically made by a Zinc and Copper correct answers Brass is a combo of which two materials Hot Working correct answers What is a metal forming above recrystallization temperature Compression Strength correct answers Why is cera...

Which of the following metals has the highest thermal conductivity? (a) carbon steel (b) stainless steel (c) aluminum (c) The Ellingham diagram (a) is a plot of thermal conductivity against temperature, (b) shows the free energy of oxide formation against temperature. (c) shows the rate of oxidation of metals against temperature. (b) True or False? A metal with a high negative free energy of oxide formation will generally require greater shielding from the atmosphere durin...