describe how you would prepare 500mL of 0.25 M NaNO3 solution?

How many mols do you want? That's mols \ M x L = ?

Then mols = grams/molar mass. You know molar mass NaNO3 and mols, solve for grams.

Then place that many g NaNO3 in a 500 mL volumetric flask, add some water, swirl until all of the NaNO3 is dissolved, add DI water to the mark, stopper, mix thoroughly.

To prepare 500 mL of 0.25 M NaNO3 solution, follow these steps:

Step 1: Determine the formula weight of NaNO3.
The formula weight of NaNO3 is the sum of the atomic weights of sodium (Na), nitrogen (N), and three oxygen (O) atoms. It can be calculated as follows:
Formula weight of NaNO3 = (Atomic weight of Na) + (Atomic weight of N) + (3 x Atomic weight of O)

Step 2: Calculate the mass of NaNO3 needed.
To calculate the mass of NaNO3 required, use the formula:
Mass (g) = (Desired molarity (mol/L)) x (Volume (L)) x (Formula weight (g/mol))
In this case, the desired molarity is 0.25 M, and the volume is 500 mL (which is equivalent to 0.5 L). Insert these values into the formula to find the mass of NaNO3 required.

Step 3: Dissolve the NaNO3 in the appropriate volume of water.
Once you have determined the mass of NaNO3 needed, measure it out on a weighing scale. Then, transfer it to a clean container. Add a small amount of water to dissolve the NaNO3, and then gradually add more water while stirring until the desired final volume (500 mL) is achieved.

Step 4: Mix well and check the concentration.
After dissolving the NaNO3, mix the solution well to ensure uniformity. You may use a stirring rod or gently swirl the container. Finally, use a suitable method (such as titration or spectrophotometry) to check if the concentration of the solution is exactly 0.25 M. Make adjustments, if necessary.

Note: Always remember to wear appropriate protective gear (such as gloves and goggles) and follow safety protocols when working with chemicals.

To prepare a 500 mL of 0.25 M NaNO3 solution, you will need to know the molar mass of NaNO3, which is composed of one sodium (Na) atom, one nitrogen (N) atom, and three oxygen (O) atoms. The molar mass of NaNO3 is approximately 85 grams per mole.

Here are the steps to prepare the solution:

1. Calculate the amount of NaNO3 needed in grams:
Molar mass of NaNO3 = 85 g/mol
Molarity (M) = 0.25 mol/L
Volume (V) = 500 mL = 0.5 L

Amount (in moles) = M x V = 0.25 mol/L x 0.5 L = 0.125 moles

Mass (in grams) = Amount (in moles) x Molar mass
Mass (in grams) = 0.125 moles x 85 g/mol = 10.625 grams

2. Measure 10.625 grams of NaNO3 using an analytical balance. Make sure to handle it with proper safety precautions.

3. Pour the measured NaNO3 into a clean and dry container, such as a beaker or a flask.

4. Add about half of the deionized or distilled water to the container. In this case, add approximately 250 mL of water to dissolve the NaNO3.

5. Swirl or stir the solution gently until all the NaNO3 is completely dissolved. Make sure there are no undissolved particles left in the solution.

6. Once the NaNO3 is dissolved, carefully add more water to the container until the total volume reaches 500 mL. This will ensure the final volume of the solution is accurate.

7. Mix the solution thoroughly by swirling or stirring it again.

Congratulations! You have prepared a 500 mL of 0.25 M NaNO3 solution.