A solution is prepared by dissolving 4.40 g of KSCN in enough water to make 340. mL of solution. What is the concentration of the solution?
A) 0.0440 M
B) 0.0543 M
C) 0.119 M
D) 0.133 M

Question

Quizplus · Accepted Answer

To calculate the concentration of the solution, we need to use the formula:

Concentration (M) = (mass of solute in grams / molar mass of solute in g/mol) / volume of solution in L

First, we need to calculate the number of moles of KSCN:

Number of moles = mass / molar mass
Number of moles = 4.40 g / 97.18 g/mol
Number of moles = 0.0453 mol

Next, we need to convert the volume from mL to L:

Volume = 340 mL = 0.340 L

Now we can use the formula to calculate the concentration:

Concentration (M) = (0.0453 mol / 0.340 L)
Concentration (M) = 0.133 M

Therefore, the answer is D.

A Solution Is Prepared by Dissolving 4