M- Texas Woman University... x C Chegg study Guided sol... x Ea e now to save a
ID: 500797 • Letter: M
Question
M- Texas Woman University... x C Chegg study Guided sol... x Ea e now to save a screen shot a apicture E s/modWibis/view.php?id 3145125 pling /biscm ming-com 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 100 Question 17 of 32 3/29/2017 11:55 PM Due Date: Map EA Sapling Learning Points Possible: 12 Grade Category: Graded CH3NH2 is a weak base (K+ 5.0 x 10 and so the salt, CH3NH3NO3 acts as a weak acid. What is the Description 13 100 pH of a solution that is 0.0790 Min CH3NH3NO3at 25 "c? Policies: omework. 14 Number You can check your answers. 15 50 pH You can view solutions when you complete or give 16 up on any questio You can keep trying to answer each question until you get it right or give up. 18 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 19 0 NO3 is a spectator ion in this situation. Start by findingthe Ka of CHaNHa'. O eTextbook 100 O Help With This Topic OWeb Help & Videos O Technical Support and Bug Reports 50 2011-2017 Sapling Learning Inc. about us careers partners privacy policy terms of use contact us help 4500 PM Ask me anything 3/24/2017 R3Explanation / Answer
concentration of CH3NH3NO3 = 0.0790 M
Kb = 5.0 x 10^-4
Ka = 2 x 10^-11
CH3NH3+ + H2O -----------------> CH3NH2 + H3O+
0.0790 0 0
0.0790-x x x
Ka = x^2 / 0.0790 - x
2 x 10^-11 = x^2 / 0.0790 - x
x = 1.257 x 10^-6
[H3O+] = 1.257 x 10^-6 M
pH = -log (1.257 x 10^-6 )
pH = 5.90
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.