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Login Service web Login Service M Course: FREN 1004 i. " m Frenth 5004 Km." biscms/mod/lbis/view.php?ld-4211679 innesota, Twin Cities CHEM 2101-Fall17- BANTZ Activities and Due Dates Ch9a 10/24/2017 05:00 PM 83.3/10010/23/2017 02:14 PM Print Calculator Periodic Table Sapling Learning Calculate the pH of 4.2 x 108 M HCI. Report your answer to the hundredths place. Number pH- 6.62 Previous Give Up & View Solution #Try AganNed H]-[OH] [cr] [H.)(04,=1.0×10-14 Use the charge balance equation: And the equation for the autoionization of water Solve for [H'] point and watch out for rounding errors h yuff r in inás question, so be sure to include at least wo digts afer the decimnal careers privacy poilicy terms of us about us

Explanation / Answer

[H+] from water = 1.0 x 10^-7 M

[H+] from HCl = 4.2 x 10^-8 M

[H+] = [H+] from water + [H+] from HCl

       = (1.0 x 10^-7 ) + ( 4.2 x 10^-8 )

       = 1.42 x 10^-7 M

pH = -log [H+]

pH = -log (1.42 x 10^-7)

pH = 6.85

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