A solution of CaCl2 is prepared by dissolving 1.004 g of the solid in approximately 30 mL of water. How many moles of CaCl2 does this solution contain?
mols = grams/molar mass = ?
To find the number of moles of CaCl2 in the solution, we need to use the formula:
moles = mass / molar mass
First, we need to calculate the molar mass of CaCl2. The molar mass is the sum of the atomic masses of all the atoms in the compound.
The atomic masses of Calcium (Ca) and Chlorine (Cl) are:
- Atomic mass of Ca = 40.08 g/mol
- Atomic mass of Cl = 35.45 g/mol
Now, we can calculate the molar mass of CaCl2:
Molar mass of CaCl2 = 1 * (40.08 g/mol) + 2 * (35.45 g/mol)
Next, we substitute the values into the formula:
moles = mass / molar mass
moles of CaCl2 = 1.004 g / molar mass of CaCl2
By calculating the molar mass of CaCl2 and substituting the given mass of CaCl2, we can find the number of moles.