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The hydroxide ion concentration in an aqueous solution at 25°C is 4.4x10-2 M. The hydronium ion concentration is M. The pH of

The hydronium ion concentration in an aqueous solution at 25°C is 4.4x10 M. The hydroxide ion concentration is M. The pH of t

Autoionization occurs when two solvent molecules collide and a proton is transferred between them. Write the autoionization r

Use pH, POH, (H20+), and (OH) relationships. (a) The hydronium ion concentration in an aqueous solution of NaOH is 1.0x10-13

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Answer #1

1)

[OH-] = 4.4*10^-2 M

use:

[H+] = Kw/[OH-]

Kw is dissociation constant of water whose value is 1.0*10^-14 at 25 oC

[H+] = (1.0*10^-14)/[OH-]

[H+] = (1.0*10^-14)/4.4*10^-2

[H+] = 2.273*10^-13 M

use:

pH = -log [H+]

= -log (2.273*10^-13)

= 12.6435

use:

pOH = -log [OH-]

= -log (4.4*10^-2)

= 1.3565

Answers:

[H+] = 2.3*10^-13

pH = 12.64

pOH = 1.36

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