How would you prepare 100.0 mL of 0.07500 M AgNO3 solution starting with pure solute?

2. An experiment calls for you to use 250 mL of 1.0 M HNO3 solution. All you have to available is a bottle of 6.0 M HNO3. How would you prepare the desired solution?

Well....I'm not the amazing Ms.Sue but I'll be glad to help. I'm not good with this stuff...but I'll try:

#2.find moles required Moles = Molarity x Litres = 1.0 x0.25 = 0.25 moles.
Litres = moles / Molarity = 0.25 / 6 = 0.0417 = 41.7 ml

To prepare 100.0 mL of 0.07500 M AgNO3 solution starting with pure solute, you need to follow these steps:

1. Calculate the amount of AgNO3 needed:
Since you want a concentration of 0.07500 M in 100.0 mL, you can use the formula:
Moles = Concentration x Volume
Moles = 0.07500 M x 0.1000 L = 0.00750 moles

2. Determine the molar mass of AgNO3:
AgNO3 consists of one silver atom (Ag), one nitrogen atom (N), and three oxygen atoms (O).
Ag = 107.87 g/mol
N = 14.01 g/mol
O = 16.00 g/mol
Molar mass = (1 x Ag) + (1 x N) + (3 x O) = 107.87 + 14.01 + (3 x 16.00) = 169.87 g/mol

3. Calculate the mass of AgNO3 needed:
Mass = Moles x Molar mass
Mass = 0.00750 moles x 169.87 g/mol = 1.274 g

4. Weigh out 1.274 g of AgNO3 using an analytical balance.

5. Transfer the weighed AgNO3 into a container.

6. Add distilled water to the container and bring the final volume up to 100.0 mL.

7. Mix the solution thoroughly to ensure uniformity.

Now, let's move on to the second question.

To prepare 250 mL of 1.0 M HNO3 solution using a bottle of 6.0 M HNO3, here's what you need to do:

1. Calculate the amount of HNO3 needed:
The desired concentration is 1.0 M in 250 mL, so you can use the formula:
Moles = Concentration x Volume
Moles = 1.0 M x 0.250 L = 0.250 moles

2. Determine the volume of the 6.0 M HNO3 solution required:
You have a 6.0 M HNO3 solution, so you can set up the equation:
Moles of 6.0 M HNO3 = Moles of 1.0 M HNO3
(6.0 M) x Volume = 0.250 moles
Volume = 0.250 moles / 6.0 M = 0.0417 L or 41.7 mL

3. Measure 41.7 mL of the 6.0 M HNO3 solution using a graduated cylinder or pipette.

4. Add distilled water to the measured HNO3 solution to bring the final volume up to 250 mL.

5. Mix the solution thoroughly to ensure uniformity.

By following these steps, you will prepare the desired concentration of HNO3 solution using the available 6.0 M HNO3 solution.