Phosphoric acid is a triprotic acid with the p K a pKa values p K a 1 = 2.148 pKa1=2.148 , p K a 2 = 7.198 pKa2=7.198 , and p K a 3 = 12.375 pKa3=12.375 . You wish to prepare 1.000 L of a 0.0300 0.0300 M phosphate buffer at pH 7.460 7.460 . To do this, you choose to mix the two salt forms involved in the second ionization, NaH 2 PO 4 NaH2PO4 and Na 2 HPO 4 Na2HPO4 , in a 1.000 L volumetric flask and add water to the mark. What mass of each salt will you add to the mixture?

Need asap question 1 minerals are organic compounds. true false question 2 what vitamin can be found in foods like oranges, grapefruits, and broccoli? a. vitamin a b. vitamin k c. vitamin c d. vitamin d question 3 what are minerals? a. chemical elements that are needed for body processes. b. organic compounds that the body needs in small amounts to function properly. c. small molecules used to build proteins. d. an organic compound that is insoluble in water and includes fats. question 4 how many types of vitamins does the human body need? a. 15 b. 11 c. 13 d. 17 question 5 vitamins are a good source of energy. true false

How is the way a mixture is combined different from how a compound is combined?

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