Please provide explanation 1. Which of the following techniques help prevent premature recrystallization?  a.Immediate cooling of the hot filtration to room temperature b.Collecting the hot filtrate in a receiving flask with hot solvent c.Filtering the filtrate through a long and narrow funnel  d.Using a conventional conical filter paper for hot filtration

Macroscale and Microscale Organic Experiments
7th Edition
ISBN:9781305577190
Author:Kenneth L. Williamson, Katherine M. Masters
Publisher:Kenneth L. Williamson, Katherine M. Masters
Chapter7: Extraction
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1. Which of the following techniques help prevent premature recrystallization? 

a.Immediate cooling of the hot filtration to room temperature
b.Collecting the hot filtrate in a receiving flask with hot solvent
c.Filtering the filtrate through a long and narrow funnel 
d.Using a conventional conical filter paper for hot filtration

2. Which of the following may cause an increase in the calculated percent recovery of the recrystallized benzoic acid?

a.Adding too much solvent in the receiving flask during hot filtration
b.Using cold water in rinsing the residue from the flask during hot filtration
c.Using fluted filter paper during hot filtration
d.Not adding animal charcoal to the solution

3. Which set of reagents can confirm that sulfate ions are present in two unkown solutions?

a.1.0 M NaOH and excess NH3
b.0.1 M Ba(NO3)2 and 0.01 M KMnO4
c.1.0 M NaOH and 0.1 M K2Zn3[Fe(CN)6]2
d.0.1 M Ba(NO3)2 and 1.0 M CH3COOH
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