Question

if 3.90 g of cuno3 is dissolved in water to make a 0.840 m solution, what is the volume of the solution in milliliters?

Answer 1

To find the volume of the 0.840 M solution, we first calculate the moles of Cu(NO3)2 using its mass and molar mass. Then, we use the molarity equation to find the volume of the solution, and convert it to milliliters.

Step-by-step explanation:

To calculate the volume of the solution, we can use the equation:

Molarity (M) = moles of solute / volume of solution (L)

Given:

Mass of Cu(NO3)2 = 3.90 g

Molarity (M) = 0.840 M

Using the molar mass of Cu(NO3)2 (187.55 g/mol), we can convert the mass to moles:

Moles of Cu(NO3)2 = 3.90 g / 187.55 g/mol = 0.0208 mol

Finally, we can rearrange the equation to solve for volume:

Volume of solution (L) = Moles of solute / Molarity

Volume of solution (L) = 0.0208 mol / 0.840 M = 0.0248 L

Converting to milliliters:

Volume of solution (mL) = 0.0248 L * 1000 mL/L = 24.8 mL