What is the pH of the mixed solution of 20mL 0.05M NaOH
30mL 0.02M H3PO4
20mL 0.02M HCl
30mL 0.02M NaCl?
Given that Pka1 of H3PO4 - 2.12
Pka2 - 7.2
Pka3 - 12.44
Please solve it step by step. I am struggling to understand how to solve it. Thank you!

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explanation:

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.

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