Calculate how many moles of hydrochloric acid are to be added to 2 liters of pure H2O so that the pH becomes equal to 2.0 ?
Calculate how many moles of hydrochloric acid are to be added to 2 liters of pure H2O so that the pH becomes equal to 2.0
Calculate how many moles of hydrochloric acid are to be added to 2 liters of pure H2O so that the pH becomes equal to 2.0
Dr W
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pH = -log[H+]
[H+] =10^(-pH) = 10^(-2.0) = 0.01 M
2 L * (0.01mol H+ / L) * (1 mol HCl / 1 mol H+) = 0.02 mol HCl
jacob s
molarity of HCl = no of moles/volume in L
= moles/2L
molarity of HCl = x/2 M
HCl --------> H+ + Cl-
moles/2 M moles/2 M
[H+] = [HCl]
[H+] = moles/2 M
2 = -log[moles/2]
moles = 0.02
0.02 moles of hydrochloric acid are to be added to 2 liters of pure H2O so that the pH becomes equal to 2.0