Question

Calculate the volume in liters that are required to contain 150.0 grams of Ca(NO₃)₂ in an 2.0 M solution.

A) 0.368 L
B) 0.229 L
C) 0.547 L
D) 0.075 L
E) 0.457 L

Answer 1

To calculate the concentration of chlorine in the solution, we need to find the moles of chlorine present. By finding the moles of CaCl₂ and converting them to grams per liter, we can determine the concentration of chlorine.

Step-by-step explanation:

To calculate the concentration of chlorine in the solution, we first need to find the moles of chlorine present. CaCl₂ (s) contains 2 moles of chlorine per mole of compound. From the given mass of CaCl₂ (s), we can calculate the moles of CaCl₂ (s). Then, we convert the moles to grams per liter:

Step 1: Calculate the moles of CaCl₂ (s):

Molar mass of CaCl₂ (s) = 40.08 g/mol + 35.45 g/mol x 2 = 110.98 g/mol

moles of CaCl₂ (s) = 2g / 110.98 g/mol = 0.018 moles

Step 2: Calculate the concentration of chlorine:

moles of chlorine = 2 moles (from CaCl₂ (s)) x 0.018 moles = 0.036 moles

concentration of chlorine = (0.036 moles / 0.150 L) x 1000 g = 2.4 g/L