As a technician in a large pharmaceutical research firm, you need to produce 400. ml of 1.00 mol l−1 potassium phosphate buffer solution of ph = 7.08. the pka of h2po4− is 7.21. you have the following supplies: 2.00 l of 1.00 mol l−1 kh2po4 stock solution, 1.50 l of 1.00 mol l−1 k2hpo4 stock solution, and a carboy of pure distilled h2o. how much 1.00 mol l−1 kh2po4 will you need to make this solution? socratic. org?

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

the increase of protons   hope this