Need to write a brief description of the procedure required to make 900mL of a 0.5 M NaCl solution. The formula weight of NaCl is 58.4g/mole.
How many mols do you want? That M x L = 0.5M x 0.900 L = 0.45 mols NaCl.
Weigh accurately 0.45 mols NaCl (grams = mols x molar mass = 0.45*58.4 = 26.3 g NaCl), completely transfer to a 900 mL volumetric flask, add some water, swirl until all of the NaCl is dissolved, then make to the mark with distilled water.
Note: As far as I know no 900 mL volumetric flasks are manufactured. I would prepare 1000 mL (1 L) of 0.5 M NaCl since 1 L volumetric flasks are available.
If you don't get your ...
To make a 0.5 M NaCl solution with a final volume of 900 mL, you will need to follow these steps:
Step 1: Calculate the amount of NaCl needed
- First, convert the desired final volume to liters by dividing 900 mL by 1000: 900 mL / 1000 = 0.9 L.
- Then, calculate the moles of NaCl needed using the formula weight and target molarity.
Moles = Molarity * Volume (in liters)
Moles = 0.5 M * 0.9 L
Step 2: Convert moles of NaCl to grams
- Multiply the moles of NaCl by the formula weight of NaCl (58.4 g/mole) to determine the grams needed.
Grams = Moles * Formula Weight
Grams = (0.5 M * 0.9 L) * 58.4 g/mole
Step 3: Prepare the solution
- Weigh the calculated amount of NaCl using a balance.
- Add the weighed NaCl to a container.
- Add enough distilled water to the container to make a final volume of 900 mL.
- Stir or shake the container until all the NaCl is dissolved.
Following these steps will allow you to make a 900 mL, 0.5 M NaCl solution.
To make a 0.5 M NaCl solution with a final volume of 900 mL, you will need to follow the following procedure:
1. Calculate the amount of NaCl needed:
- Convert the desired final volume from milliliters (mL) to liters (L): 900 mL ÷ 1000 = 0.9 L
- Calculate the number of moles of NaCl needed using the formula weight: 0.5 mol/L × 0.9 L = 0.45 moles
2. Determine the mass of NaCl required:
- Multiply the number of moles obtained in step 1 by the formula weight of NaCl: 0.45 moles × 58.4 g/mole = 26.28 grams
3. Weigh out 26.28 grams of NaCl using a balance.
4. Dissolve the weighed NaCl in a container with distilled water:
- Add some distilled water to the container.
- Gradually add the weighed NaCl to the water while stirring until it is completely dissolved.
5. Once the NaCl is completely dissolved, you can add more distilled water to bring the final volume up to 900 mL. Make sure to stir the solution again to ensure proper mixing.
6. Transfer the solution to a storage container, such as a beaker or a bottle with a screw cap, for later use.
Remember to handle the NaCl carefully, and dissolve it in a well-ventilated area. It is also crucial to wear appropriate protective equipment, such as gloves and goggles, when working with chemicals.