I calculated 184.211mL ETOH and 65.7895 mL water from previous calculation. 2. S

Question

I calculated 184.211mL ETOH and 65.7895 mL water from previous calculation. 2. Satisfied that you correct calculated how much 95% ETOH to make 250 mL of 70% ETON (above), you walk to the lab and take a 1-liter volumetric flask and make the dilution based on your calculation above. You add the 95% Emu and bring the solution to volume. As you are labeling the bottle as 70% ETOH, you realize your mistake. Oops! You did not use a 250 -ml. volumetric flask. So what is the actual concentration of the solution you just made? Show your work.

Explanation / Answer

You want to make 250 mL ethanol 70% from ethanol 95 %
250 * 70 = a * 95
a =17500/95 = 184.21

Take 184.21 mL (the precision depends on the purpose) ethanol 95 and 65.7895 ml water

yes your answer is right

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

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