# stock

1. ### How do I calculate the concentration of a stock solution?

How do I calculate the concentration of a stock solution prepared in a 100cm3 volumetric flask that contains 75mg of Acesulfame K, 50mg of Saccharin and 200mg of Aspartame ?
2. ### Stock Solution Question

If I have a a 40% solution and a 95% solution, how much of each do I need to make a 70% solution with a final volume of 375 ml? My 30 credits in chemistry was too many years ago and I'm out of practice (and stuck.). I've been playing around with the stock formula and algebraically rearranging...
3. ### How much of each stock would you need for 100 ml of buffer?

I don't really know how to do this question - please help! You are running a biochemical assay with an enzyme that needs to maintain a constant pH of 6.6 in order to operate effectively. Using starting stock solutions of 0.2M of NaH2PO4 and Na2HPO4, how much of each stock would you need for 100...
4. ### Glassware used in stock solution?

--Provide the calculations and experimental procedure necessary to make the following solution: 10.00 mL of a 0.0300 M solution of CH3COOH from a stock solution with a concentration of 0.0780 M. Use the equation: M1V1 = M2V2. V1 = (10.00 mL)(0.0300 mol/L) = 0.300 mol V1 = (0.300 mol/0.0780...