Need help with question please 5- Which of the following would decrease the percent yield duringrecrystallization? {A- cooling in ice for too longB- using too much solventC- using too little solventD- not drying the crystals long enoughE- both b and d6- What is the purpose of the drying agent? (A- Add to the aqueous layer to remove any water contaminationB- Add to the organic layer to remove any water contaminationC- Add to the aqueous layer to remove contamination by organic productD- Add to both layers to remove excess acid or base3

(5) using too much solvent is the correct answer.Reason: if too much solvent is used then it will…

Answered: 5- Which of the following would…

World of Chemistry, 3rd edition

3rd Edition

ISBN:9781133109655

Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Chapter15: Solutions

Section15.1: Forming Solutions

Problem 6RQ

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Select all the statements below that are correct about Recrystallization O By dissolving both impurities and a compound in an appropriate solvent, either the desired compound or impurities can be removed from the solution O Recrystallization is a technique that results in crystal purification O Recrystallization should only be performed with a solvent that boils at room temprature O Hot filtration can be used to separate impurities that are insoluble in the boiling solvent O Impurities are removed from a crystal lattice with rapid cooling during the Recrystallization process O Recrystallization is a type of synthesis reaction
Which of the following statements is true when considering temperature during a recrystallization? More than one answer may be correct. Using ice to cool the sample will speed up the crystallization process so that large crystals will be formed. It is important that the sample is dissolved in just enough hot solvent. O Ideally the hot solvent used will keep the impurities dissolved OR not dissolve them at all. Enough cold solvent should be added to dissolve the sample BEFORE heating it past its boiling point.
Clear and concise solutions please. Tha k u
Write TRUE if the BOLD word/phrase makes the statement correct. Otherwise, write the correct WORD/PHRASE that will make the statement true. If there are two bold words/phrases in a number, write your answer for EACH of the bold words/phrases. 1. In the extraction of caffeine, NaOH was added to dry the collected organic layer. 2. Purification of caffeine via sublimation was possible because it has a high sublimation point at a temperature above its melting point. 3. The E/Z designation is used to describe the orientation of identical groups in alkenes.
Which of these is NOT a criteria for selecting a good solvent for recrystallization? (A) Solvent dissolves very little or none at room temperature (B) Solvent has solubility different from that of the compound (C) Solvent has a boiling point above the melting point of the compound (D) Solvent has a relatively low boiling point
Stationary phase is: Select one: O a. Solid phase O b. Organic solvent Oc.Liquid phase
= STATES OF MATTER Applying like dissolves like For each solute, click the button under the better solvent. solute CaCl₂ NaCl CH3 (CH₂) CH3 Which is the better solvent? CH3OH O CC14 H₂O CH₂(CH₂) CH3 4 CC14 H₂O
Why would industry prefer to purify solids by sublimation or zone refining rather than recrystallization? (Hint: is there anything wasteful about recrystallization)
i need the answer quickly
Dynamic equilibrium can be defined as O rate of dissolution rate of dissolving rate of condensing > rate of bubbling rate of dissolution = rate of recrystallization. rate of dissolution > rate of recrystallization.
6. Describe the differences between flocculated and deflocculated suspensions. 7. What is the purpose of a wetting agent in a suspension dosage form?
Why does micelle formation take place when soap is added to water? Will a micelle be formed in other solvents such as ethanol also?

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