Answered

Explore IDNLearn.com to discover insightful answers from experts and enthusiasts alike. Discover prompt and accurate answers from our community of experienced professionals.

40.0g of ethanol, C2H5OH, is dissolved in 150.0L of solution. Determine the molarity of ethanol in this solution.

Sagot :

CintiaSalazaridn

Answer:

The molarity of ethanol is 5.8*10⁻³ M.

Explanation:

Molar concentration is a measure of the concentration of a solute in a solution, be it some molecular, ionic or atomic species.

Molarity or Molar Concentration is the number of moles of solute that are dissolved in a certain volume. It is calculated by dividing the moles of the solute by the volume of the solution:

[tex]Molarity=\frac{number of moles of solute}{volume}[/tex]

Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].

Being the molar mass of ethanol 46 [tex]\frac{g}{mol}[/tex], then the number of moles that 40 grams of ethanol contain is calculated by:

[tex]40 grams*\frac{1 mol}{46 grams} =0.87 moles[/tex]

So, being:

  • number of moles of solute= 0.87 moles
  • volume 150 L

Replacing in the definition of molarity:

[tex]Molarity=\frac{0.87 moles}{150 L}[/tex]

Solving:

Molarity= 5.8*10⁻³ M

The molarity of ethanol is 5.8*10⁻³ M.

We appreciate your presence here. Keep sharing knowledge and helping others find the answers they need. This community is the perfect place to learn together. Thank you for visiting IDNLearn.com. We’re here to provide clear and concise answers, so visit us again soon.