How to calculate the molarity of commercial bleach
To calculate the molarity of commercial bleach, you need to know the concentration of the active ingredient, usually sodium hypochlorite (NaClO), in the bleach solution.
Here are the steps to calculate the molarity:
1. Find the concentration of sodium hypochlorite (NaClO) in commercial bleach. This information is typically provided on the bleach bottle or label. It is usually expressed as a percentage or as a weight/volume concentration (e.g., grams per liter).
2. Convert the concentration of NaClO to moles per liter. To do this, you need to know the molar mass of NaClO. The molar mass of Na is approximately 22.99 g/mol, the molar mass of Cl is approximately 35.45 g/mol, and the molar mass of O is approximately 16.00 g/mol. So, the molar mass of NaClO is about 22.99 + 35.45 + 16.00 = 74.44 g/mol.
3. Divide the concentration (in grams per liter) by the molar mass (in grams per mole) to get the moles of NaClO per liter.
4. The result from step 3 is the molarity (moles of solute per liter of solution) of the commercial bleach solution.
Note: Make sure to use the appropriate units for each step of the calculation and double-check your conversion factors to ensure accuracy.
Remember to handle commercial bleach with caution, as it is a strong oxidizing agent and can be harmful if mishandled.