chemistry problem. simple. Is this correct?

Question

chemistry problem. simple. Is this correct?
make 50ml of solution
from:
25mM of tris
50mM of glucose
10mM of EDTA
____________
should I calculate each one seperately..
.025mol/L * .05L * 121 (MW of tris) = .15 g?
And do the other 2 the same way?
I get the answer in g? and then would i combine it all in one beaker then add water?

Answer 1

try it separately....be sure the conversion from moles to grams is correct in both calculations

Answer 2

You are asked to make a given volume of solution containing a certain number of mM of several ingredients.

You find the weight of a mM of an ingredient by using the molecular weight of that ingredient, so yes you need to run the calculation for each ingredient. mM means milliMole and moles are measured in grams so your answer should be in milligrams.

If you changed the volume of the solution, would you change the number of mMs used?

Please note mM is often used in chemistry to denote a concentration, or molarity (Moles/liter)of a solution. If you try to use that definition in this problem though, it doesn't tell you how much to use.

Answer 3

Your question isn't clever. If the gas started at 60 levels, you won't be able to "strengthen it to ten levels". you could strengthen it by 10 levels, wherein case the rigidity could additionally strengthen.