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ID: 500795 • Letter: M
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M- Texas Woman University... x C Chegg study Guided sol... x Ea e now to save a screen shot a apicture E /biscm 3145125 ming-com pling 3/29/2017 11:55 PM CA 100 G 3/23/2017 11:49 AM Gradebook o Assignment Information Attempts Score a Print Calculator Periodic Table Available From: 3/2/2017 12:00 AM Question 8 of 32 3/29/2017 11:55 PM Due Date: Map EA Sapling Learning Points Possible: Grade Category: Graded Description 90 If the Kn of a monoprotic weak acid is 2,5 x 10e what is the pH of a 0,46 M solution of this acid? Policies: omework. You can check your answers. pH You can view solutions when you complete or give up on any questio You can keep trying to answer each question until you get it right or give up. You lose 5% of the points available to each answer O Previous 8 Give Up & View solution check Answer O Next Exit in your question for each incorrect attempt at that If the concentration is more than 1000 times greater than the Ka, then you can make an assumption that simplifies the algebra needed to solve the problem. Otherwise, you need to solve a quadratic equation. O eTextbook 12 O Help With This Topic OWeb Help & Videos O Technical Support and Bug Reports 50 o2011-2017 Sapling Learning, Inc. about us careers partners privacy policy terms of use contact us help 4-45 PM Ask me anything 3/24/2017 R3Explanation / Answer
Ka = 2.5 x 10^-6
concentration of acid = 0.46 M
[H+] = sqrt (Ka x C)
= sqrt (2.5 x 10^-6 x 0.46)
= 1.07 x 10^-3 M
pH = -log [H+] = -log (1.07 x 10^-3)
pH = 2.97
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