Question

Then, calculate the molarity of a solution made by adding 5.57 g of CaCl2 to enough water to create a solution with a total volume of 2.50 L. Enter only a numerical value in the correct number of significant figures.

Answer 1

The answer to your question is: 0.02 M

Step-by-step explanation:

Data

mass = 5.57 g

volume = 2.50 L

Formula

Molarity =
`(moles)/(volume (liters))`

Process

1.- Calculate the molecular mass of CaCl₂

Molecular mass 0f CaCl₂ = 40 + (35.5 x 2) = 111 g

2.- Calculate the moles of CaCl₂ in 5.57 g

111 g of CaCl₂ ---------------- 1 mol

5.57 g of CaCl₂ ------------- x

x = (5.57 x 1) / 111

x = 0.050 moles of CaCl₂

3.- Calculate molarity

`Molarity = (0.050)/(2.5)`

Molarity = 0.02