Question

What is the molarity (M) of an 85.0-mL solution (total volume) containing 1.77 g of ethanol (C2H5OH)

Answer 1

Answer: The molarity of solution is 0.453 M

Step-by-step explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

`Molarity=(n* 1000)/(V_s)`

where,

n = moles of solute

`V_s` = volume of solution in ml

moles of
`C_2H_5OH` =
`\frac{\text {given mass}}{\text {Molar mass}}=(1.77g)/(46g/mol)=0.0385mol`

Now put all the given values in the formula of molality, we get

`Molarity=(0.0385* 1000)/(85.0)`

`Molarity=0.453`

Therefore, the molarity of solution is 0.453 M