Understanding the Terms
* 1M: This stands for "1 molar," meaning there is 1 mole of NaCl dissolved in 1 liter of solution.
* Molar Mass: The molar mass of NaCl is 58.44 g/mol (approximately).
Materials:
* NaCl (sodium chloride) - table salt
* Distilled or deionized water
* Volumetric flask (1 L)
* Weighing paper or boat
* Analytical balance
* Stirring rod or magnetic stirrer
* Safety goggles
Procedure:
1. Calculate the mass of NaCl:
* You need 1 mole of NaCl per liter of solution.
* Multiply the molar mass of NaCl by the desired moles: 58.44 g/mol * 1 mol = 58.44 g.
* You will need 58.44 grams of NaCl to make 1 liter of a 1M solution.
2. Weigh the NaCl:
* Use an analytical balance to accurately weigh out 58.44 grams of NaCl.
3. Transfer the NaCl to the volumetric flask:
* Carefully transfer the weighed NaCl to a 1-liter volumetric flask.
4. Add a small amount of water:
* Add a small amount of distilled or deionized water to the flask, just enough to dissolve the NaCl.
* Use a stirring rod or magnetic stirrer to help dissolve the NaCl.
5. Fill the flask to the mark:
* Once the NaCl is fully dissolved, add more water to the flask until the meniscus reaches the 1-liter mark.
* Ensure the bottom of the meniscus is aligned with the mark on the flask.
6. Mix thoroughly:
* Carefully stopper the flask and invert it several times to ensure the solution is thoroughly mixed.
Important Notes:
* Accuracy: Accurate weighing of the NaCl is crucial for a 1M solution.
* Water Quality: Using distilled or deionized water is essential to avoid impurities that could affect the concentration.
* Temperature: The volume of water changes with temperature. Prepare the solution at room temperature, and if you need a specific temperature, adjust the final volume accordingly.
* Safety: Wear safety goggles while working with chemicals.
Storage:
* Store the 1M NaCl solution in a tightly sealed container at room temperature.
* Label the container clearly with the solution's name, concentration, and date of preparation.
Let me know if you have any other questions!
