Recrystallization - Study guides, Class notes & Summaries

BIOCHEMISTRY LAB 2 REPORT 2023/2024| PORTAGE LEARNING|WITH PROCEDURES, EXPLANATION AND FINAL RESULTS.HIGHLY RECOMMENDED Lab 2 Report: Recrystallization Chem 212

isomass recrystalization correct answers change in surface area to volume accretive recrystalization correct answers adjacent crystals combine migratory recystalization correct answers Caused by a fluctuation in storage temperature migratory crystallization steps correct answers food warms causes food on surface to dehydrate Increases vapor pressure on the surface Moisture migrates to lower pressure when temp drops water vapor joins existing ice crystals when a product reaches ...

T/F: Drip loss increases with slower rates of freezing or increased recrystallization. correct answers True T/F: During freeze drying it is critical to keep the vapor pressure and temperature above the triple point. correct answers False T/F: When designing a fruit and vegetable processing plant it is important to take into account the heat of respiration when installing an appropriately sized refrigeration system. correct answers True T/F: Cold shortening of muscle proteins limits the ...

BIOCHEMISTRY LAB 2 REPORT 2023/2024| PORTAGE LEARNING|WITH PROCEDURES, EXPLANATION AND FINAL RESULTS.HIGHLY RECOMMENDED Lab 2 Report: Recrystallization Chem 212

What's the reason for filtration in recrystalization - correct answers to remove insoluble impurities ortho and para are more stable why - correct answers because allow for tertiary carbocation when can you skip filtration during recryst. - correct answers if no insoluble impurities are present why warm filter tip pipets - correct answers to prevent premature crystalization why cant the solvent from a recrystallization be removed via evaporation instead of centrifugation? - correct ...

If you add more than a minimum amount of ethanol when recrysallizing, how does that affect % recovery - correct answers Less crystals, % recovery decreases List 2 features of the mp of an impure compound - correct answers -Lower -Broad range List 2 features of the mp of a pure compound - correct answers -correct mp -narrow range 2 Features of a good solvent for recrystallization - correct answers -insoluble at colder temps -soluble at hot temps -All impurities soluble at all temper...

What is a technique used to purify organic solids?recrystallization When an organic chemist conducts a recrystallization, he chooses a solvent that will what?completely dissolve both the desired compound and any other organic impurities when that solvent is at BP In addition to solubility at boiling temperature requirement of the solvent in recrystallization, the desired compound must also be what?insoluble in the chosen solvent at cold temperatures, and the organic impurities must rem...

CHEM 343 Lab Final Exam | Questions with Verified Answers Acetic acid is a weak acid. When acetic acid dissolves in water to make a solution, what is the major form of acid in the solution? a. Water b. Hydronium ion c. Acetate ion d. Hydroxide ion e. Acetic acid Rank the following compounds in order of their increasing pKa (lowest pKa to highest): water, methane, benzoic acid, HCl a. HCl, water, benzoic acid, methane b. HCl, benzoic acid, water, methane c. water, methane, HCl, benzoic acid d....

This is the entire section of the first lab for CLAB 267, including the purpose, table of chemical properties, procedure, chemical reactions, data/calculations, and the discussion of results.

What is an epoxide correct answers A three-membered ring that contains oxygen as one of the ring atoms. Lots of ring strain What is the most common way turn an alkene into an epoxide? correct answers By treating it with a proxy acid (m-CPBA) However, this proxy acids are explosive and hard to handle. During the first portion of trans-stilbene experiment, what was the function of NBS? correct answers NBS provided a bromide atom via bromohydration reaction, which created a bromonium ion on t...