11/27/2016 11:55 PM 8A/10 Gradebook te Print calaulator Periodic Table Question

Question

11/27/2016 11:55 PM 8A/10 Gradebook te Print calaulator Periodic Table Question 6 of 8 Sapling Learning Map At 25 SC, how many dissociated H' ions are there in 321 mL of an aqueous solution whose pH is 11.95? 3.60 x 10 10 ions There is a hint available! divider bar again to hide the hint. O Previous dive up view solution chack Answer o Next Eva L. Resources O Assig Availab Due Da Points Grade C Descript Policies: You can You can up on an You can k you get it There is n o eTextbo o Help Wit o Web Hel O Technica

Explanation / Answer

pH = 11.95 .

[H+] = 10^ -11.95 = 1.122 x 10^ -12 M

volume of solution = 321 ml = 0.321 L

Moles of H+   = M x V = 1.122 x 10^ -12 x 0.321 = 3.6 x 10^ -13

Number of H+ = moles of H+ x avagadro number

              = 3.6 x 10^ -13 x 6.023 x 10^23 = 2.17 x 10^ 11

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