Calculate the concentration of the following solution: 12 g of KCl dissolved in 650 cm³ of water.

To calculate the concentration of the solution, we first need to convert the mass of KCl to moles using its molar mass.

Molar mass of KCl = 39.10 g/mol (K) + 35.45 g/mol (Cl) = 74.55 g/mol

Number of moles of KCl = 12 g / 74.55 g/mol = 0.161 moles

Now, we need to calculate the concentration in moles per liter (Molarity).

Volume of solution = 650 cm³ = 0.65 L

Concentration = 0.161 moles / 0.65 L = 0.248 M

Therefore, the concentration of the solution is 0.248 M.

Step 1: Convert the volume from cm³ to L

650 cm³ = 0.650 L

Step 2: Calculate the number of moles of KCl

Moles of KCl = mass / molar mass
Moles of KCl = 12 g / 74.55 g/mol
Moles of KCl = 0.161 mol

Step 3: Calculate the concentration in M

Concentration = moles of solute / volume of solution (in L)
Concentration = 0.161 mol / 0.650 L
Concentration = 0.248 M

Therefore, the concentration of the solution is 0.248 M.