assuming a drop is 0.05ml (or that you started with 1% by volume ethylbenzene in

Question

assuming a drop is 0.05ml (or that you started with 1% by volume ethylbenzene in cyclohexane solution), the molecular weight of ethylbenzene is 106.17g/mol and its density is 0.8672g/m. what is the concentration of ethylbenzene in cyclohexane im your final spectrum ? what is your molar extinction coefficient (e) of the ethylbenzene in cyclohexane at 260nm? assuming a drop is 0.05ml (or that you started with 1% by volume ethylbenzene in cyclohexane solution), the molecular weight of ethylbenzene is 106.17g/mol and its density is 0.8672g/m. what is the concentration of ethylbenzene in cyclohexane im your final spectrum ? what is your molar extinction coefficient (e) of the ethylbenzene in cyclohexane at 260nm? assuming a drop is 0.05ml (or that you started with 1% by volume ethylbenzene in cyclohexane solution), the molecular weight of ethylbenzene is 106.17g/mol and its density is 0.8672g/m. what is the concentration of ethylbenzene in cyclohexane im your final spectrum ? what is your molar extinction coefficient (e) of the ethylbenzene in cyclohexane at 260nm?

Explanation / Answer

volume (V) = 0.05ml

Mw = 106.17 g/mol

density (d) = 0.8672 g/ml

weight = d x V

          = 0.8672 x 0.05

          = 0.043 g

now molarity

M=   (w/Mw) x 1000/V(ml)

     = (0.043 /106.17) x 1000/0.05

      = 8.16 M

concentration of ethylbenzene = 8.16 M

note :

for second part   : for 1% solution path lenght = l = 1cm

A = e C l

here A is not given . i do not know how to calculate (e) without A (absorbance).

the wave lenght is not useful here

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.