Please explain! Questions: 4-3. You are presented with four vials, each containi
ID: 886480 • Letter: P
Question
Please explain! Questions: 4-3. You are presented with four vials, each containing a white crystalline solid. Two are unlabeled vials containing pure samples of tran acid and urea, respectively. The other two are labeled reference standards for each sample. Devise a method for the proper identification of the unlabeled vials, knowing that the literature melting point for both trans- cinnamic acid and urea is 132.5-133 C. 5-27. You perform a recrystallization on 60 mg of a solid material and isolate 45 mg of purified material. What is the percent recovery? Further concentration of the mother liquor provides an additional 8 mg of material. What is the total percent recovery?Explanation / Answer
5.27 ) original solid material = 60 mg
from this purified material = 45 g
percent recovery = obtained / original
=( 45/ 60 ) x 100
percent recovery = 75 %
further recovery = 8 mg
total recovery = 45 +8 = 53 mg
total recovery percent = total recovery / original mother
= (53 / 60 ) x 100
total recovery percent = 88.33 %
note : 4 .3 ) data i cannot see any question there. that is only data i think