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.
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
4 answers
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.
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.
2 answers