1) In a laboratory experiment, students synthesized a new compound and found tha
ID: 893842 • Letter: 1
Question
1) In a laboratory experiment, students synthesized a new compound and found that when 10.07 grams of the compound were dissolved to make157.2 mL of a ethanol solution, the osmotic pressure generated was 5.75 atm at 298 K. The compound was also found to be nonvolatile and a non-electrolyte.
What is the molecular weight they determined for this compound?
g/mol
2) The nonvolatile, nonelectrolyte chlorophyll , C55H72MgN4O5 (893.5 g/mol), is soluble in ethanol CH3CH2OH.
How many grams of chlorophyll are needed to generate an osmotic pressure of 1.14 atm when dissolved in 267 ml of a ethanol solution at 298 K.
grams chlorophyll
Explanation / Answer
There are multiple questions here . i am allowed to answer only 1 at a time. I will answer 1st question for you.Please ask other as different question
1)
P = C*R*T
5.75 = C*0.0821*298
C= 0.235 M
C is concentration
C = mass / {Molar mass * Volume in L}
0.235 =10.07 / {Molar mass *0.1572}
Molar mass = 272.6 g/mol
Answer: 272.6 g/mol
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.