/ibiscms/mod/ibis/view.php?id 2533191 WWW sapling learning.com App Attempts Scor

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/ibiscms/mod/ibis/view.php?id 2533191 WWW sapling learning.com App Attempts Score Print Calculator Periodic Table Questi 27 of 39 20 Map A certain weak base has a Kb of 9.00 x107. What concentration of this base will produce a pH of 10.39? 70 23 95 Number 8.7x 10 10 M 24 95 25 26 90 27 28 29 67 30 29 There is a hint available! ing on the bottom divider bar, Click on the 32 divider bar again to hide the h Close 33 Previous Give Up & View Solution Check Answer Next Exit Hint Copyright 2011 2016 Sapling Learning, Inc. 37 about us careers partners privacy policy terms of use tact us help Ask me anything Available From 20/2016 11:30 PM 5/13/2016 11:30 PM Due Date Points Possible 100 Grade Category: Graded Description: Policies: Homework u can check your a You can view solutions when you complete or give up on any question. you get it right or give up each question until keep trying You lose 5% of the points available to each answer in your question for each incorrect attempt at that o Help With This Topic OWeb Help & Videos Technical Support and Bug Reports 903 PM 4/23/2016

Explanation / Answer

find out the pOH using

pH + pOH = 14

pOH = 14-pH = 14-10.39

pOH = 3.69

now use the direct equation

[OH-] = 10-pOH

[OH-] = 10-3.69 = 2.04 x 10-4 M

answer is 2.04 x 10-4 M

or 0.000204M

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