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Use the References to access important values if needed for this questio What concentration of sodium...

Question

Use the References to access important values if needed for this questio What concentration of sodium...

Use the References to access important values if needed for this questio What concentration of sodium hydroxide is needed to give an aqueous solution with a pH of 11.630? Molarity of sodium hydroxide Submit Answer Try Another Version 8 item attempts remaining 1 pt 1 pt FS FS 2 4
Use the References to access important values if needed for this questio What concentration of sodium hydroxide is needed to give an aqueous solution with a pH of 11.630? Molarity of sodium hydroxide Submit Answer Try Another Version 8 item attempts remaining 1 pt 1 pt FS FS 2 4

Answers


use:
pH = -log [H+]
11.63 = -log [H+]
[H+] = 2.344*10^-12 M

use:
[OH-] = Kw/[H+]
Kw is dissociation constant of water whose value is 1.0*10^-14 at 25 oC
[OH-] = (1.0*10^-14)/[H+]
[OH-] = (1.0*10^-14)/(2.344*10^-12)
[OH-] = 4.266*10^-3 M

[NaOH] = [OH-]
= 4.266*10^-3 M
Answer: 4.266*10^-3 M


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