you will need to explain in detail how to make 100.0 ml of a 0.500M CUSO4.5H20(s) SOLUTION. BE SPECIFIC about the measurements you would make and the type of equipment you will use . write out steps
How many grams do you want? That's
M x L x molar mass = grams. You know L, M, and molar mass. Solve for grams. What do you not understand about making this up? You always add grams to a volumetric flask, add some water, swirl until all solid is dissolved, make to the mark, mix thoroughly, stopper. You fill in the details. Post your complete statement if you would like for me to check it.
Also, I'm trying to figures out just what pre-AP chemistry is.
ok . that didn't help at all . @drbob222
OK, so you can't read and follow directions. You want me to do all of the work and you just copy it. Here goes BUT you must wade through the explanation as I go.
How many grams do you want? That's
L x M x molar mass = grams.
100 mL is 0.1 L from the problem.
M is 0.500 M from the problem.
mols mass CuSO4.5H2O = You do it but it's about 250 for this illustration. If you want a more exact number you can recalculate the molar mass and recalculate the grams. So
0.1 x 0.5 x 250 = 12.5 grams CuSO4.5H2O.
Next, I wrote this. You always add grams to a volumetric flask, add some water, swirl until all solid is dissolved, make to the mark, mix thoroughly, stopper. You fill in the details..
I GAVE you the details. You only had to follow the steps. I didn't say use 100 mL volumetric flask; I thought that was obvious. I didn't say to use distilled water; in chemistry no one uses tap water to make up solutions of anything. I would have preferred you to tell me what you didn't understand instead of that bland statement "that didn't help at all". We can't help you if you don't help us help you. I can assure that I'm not being nasty and I'm not being rude; I am most certainly telling it like it is. If you want help you must help us help you; otherwise, it's a lost cause. It may be that you have no idea what a volumetric flask or a mark on a volumetric flask is. If so you could have said so and we could have gone from there. But a "that didn't help at all" leaves me out in the cold trying to guess at what you don't understand.
Here is what you would have written:
Place 12.5 grams CuSO4.5H2O in a 100 mL volumetric flask, add some water, swirl the solution until all of the solid is dissolved, add distilled water until the level of the water reaches the mark on the neck of the 100 mL volumetric flask, stopper, mix thoroughly, and voila, you have prepared 100 mL of 0.5 M CuSO4.5H2O.
I hope this helps you over the hump. If there is something in the above that you don't understand, I shall be happy to help you through it. Also, I encourage you to visit us anytime with future questions.
To make a 100.0 ml of a 0.500M CUSO4.5H2O(s) solution, you will need the following materials and equipment:
Materials:
- Copper(II) sulfate pentahydrate (CUSO4.5H2O) solid
- Distilled water
Equipment:
- Analytical balance or electronic balance
- 100.0 ml volumetric flask
- Stirring rod or magnetic stirrer
- Pipette or burette
- Beaker or graduated cylinder
- Spatula or weighing paper
- Safety goggles and gloves
Here are the steps to make the solution:
1. Put on safety goggles and gloves for protection.
2. Set up the analytical balance or electronic balance on a stable surface and turn it on. Ensure that it is calibrated and zeroed.
3. Prepare the volumetric flask by cleaning and drying it thoroughly.
4. Use a spatula to weigh out the appropriate amount of Copper(II) sulfate pentahydrate (CUSO4.5H2O). To calculate the mass needed, use the formula:
Mass (g) = Volume (L) x Concentration (mol/L) x Molar mass (g/mol)
In this case, the desired volume is 100.0 ml (0.100 L) and the desired concentration is 0.500 mol/L. The molar mass of CUSO4.5H2O is 249.68 g/mol.
5. Carefully transfer the weighed CUSO4.5H2O into a beaker or graduated cylinder.
6. Add a small amount of distilled water to the beaker or graduated cylinder and dissolve the CUSO4.5H2O by stirring it with a stirring rod or using a magnetic stirrer.
7. Transfer the dissolved CUSO4.5H2O solution into the 100.0 ml volumetric flask. Rinse the beaker or graduated cylinder with additional distilled water and transfer the rinsate into the flask. The solution should be filled to the mark on the neck of the flask.
8. Use a pipette or burette to adjust the volume precisely to 100.0 ml. This can be achieved by adding or removing small amounts of solution until the bottom of the meniscus aligns with the mark.
9. Carefully cap the volumetric flask and mix the solution thoroughly by inverting it multiple times or using the stirring rod or magnetic stirrer.
10. Label the volumetric flask with the appropriate information, such as the chemical name, concentration, and date of preparation.
Remember to follow all safety precautions while handling chemicals and dispose of any waste properly.