12.5 g of KCl (MM = 74.55 g/mol) is dissolved in enough water to make 675 mL of solution. Calculate the molarity of the KCl solution.

Molarity= molessolute/volume= 12.5/74.55/.675

= 12.5/(74.55*.675)

To calculate the molarity of a solution, you need to know the number of moles of solute (KCl) and the volume of the solution in liters. Let's follow these steps to find the molarity:

Step 1: Calculate the number of moles of KCl:
To find the number of moles, you can use the formula:

Moles = Mass / Molar mass

Given:
Mass of KCl = 12.5 g
Molar mass of KCl (MM) = 74.55 g/mol

Using the formula, we can calculate the number of moles:

Moles of KCl = 12.5 g / 74.55 g/mol

Step 2: Convert the volume of the solution to liters:
Given:
Volume of solution = 675 mL

To convert milliliters to liters, we use the conversion factor: 1 mL = 0.001 L

Volume of solution in liters = 675 mL x 0.001 L/mL

Step 3: Calculate the molarity:
Now that we have the number of moles of KCl and the volume in liters, we can calculate the molarity:

Molarity = Moles / Volume

Substituting the calculated values:

Molarity = (12.5 g / 74.55 g/mol) / (675 mL x 0.001 L/mL)

Simplifying:

Molarity = 0.1677 mol / 0.675 L

Finally,

Molarity = 0.248 M

Therefore, the molarity of the KCl solution is 0.248 M.