We have a 10% NaCl stock solution. Our nutrient solution is 3 mM for NaCl. How many ml of stock solution do we need for 500 ml of our solution nutrients? (MNaCl:58.49)

Which of the following combinations would be the best choice to buffer the pH of a solution at approximately 7? Ionization Constants for Aqueous Weak Acids at 25 °C Acid K. (pK,) Conjugate Base Hydrogen phthalate ion, Cg H4(CO2H)(CO2) Acetic acid, CH3 CO,H Acetate ion, CH; CO2- 1.8 x 10-5 (4.74) Weak Acid Phthalic acid, C6 H4 (CO,H)2 1.3 x 10-3 (2.89) Dihydrogen phosphate Hydrogen phosphate ion, H2 PO4 Hydrogen phosphate ion, HPO42 6.2 x 10-8 (7.21) ion, HPO,2- Phosphate ion, PO,* 3.6 x 10-13 (12.44) O Na, HPO4 and NagPO4 O NaH2 PO4 and NazHPO4 O H;PO4 and NaH2 PO4

A 25 year old male patient requires a 5 mL injection of sodium valproate 200 mg/mL. The displacement volume for sodium valproate is 0.56 mL/g. What volume of water for injections in millilitres should be added to the patient’s dose of sodium valproate for it to be correctly reconstituted?  State your answer to 2 decimal places. units= ml

With a stock concentration of 0.2817 g/L, determine each standard's concentrations. What is the mass of iron in the vitamin?

A stock solution has a concentration of 3.04 NE tf 29.4 mt. of the stack solution is cliluted to a total volume of 180 ml, what is the final concentration (in MP

Calculate the concentration of the unknown protein in mg/ml.

Draw titration curve for compound X when NaOH equivalence(s) is/are added. Indicate the buffering region(s) with a box.

What happened to the pH when the cola and borax solution was added to the water? Explain

Calculate the pH of the solution that results following addition of 10 mL of 1 M NaOH to 40 mL of 1 M NH4Cl

It takes 175ml of 0.75 M H2SO4   to completely neutralize 285 ml of NaOH.  What is the concentration of the NaOH solution?