Texas Woman University.... X C Chegg study Guided sol X /biscm 3145131 ming-com

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Texas Woman University.... X C Chegg study Guided sol X /biscm 3145131 ming-com Ga e a now to save a screen shot a apicture A pling 3/29/2017 55 PM CA 383/100 G 3/22/2017 08:28 PM Gradebook o Assignment Information Attempts Score tr Print Calculator Periodic Table Available From: 3/3/2017 12:00 AM Question 16 of 22 3/29/2017 11:55 PM Due Date: Map EA Sapling Learning Points Possible: 100 Grade Category: Graded 95 At 22 °C an excess s amount of a generic metal hydroxide M(OH s mixed with pure water. The resulting Description equilibrium solution has a pH of 10.36. What is the Ksp of the salt at 22 C? Policies: omework. 10 You can check your answers. 4.37 11 You can view solutions when you complete or give up on any questio 12 You can keep trying to answer each question until you get it right or give up. 13 You lose 5% of the points available to each answer Expla e Previous Give up &view; solution Try Again o H Next Exi 14 in your question for each incorrect attempt at that KSD can be calculated from the molar concentrations of the two ions formed when a salt dissolves in water, 15 The poH is determined from the pH O eTextbook poH 4- pH The OHT concentration can be determined from the poH. O Help With This Topic 17 poH OH 10 OWeb Help & Videos 18 95 According to the balanced chemical reaction, the M2 concentration is half theoH concentration. 19 O Technical Support and Bug Reports 2011-2017 sapling Learning, Inc. about us careers partners privacy policy terms of use contact us help 4:38 PM Ask me anything 3/24/2017 R3

Explanation / Answer

if pH = 10.36

then

pOH = 14-10.36 = 3.64

[OH-] = 10^-pOH = 10^-3.64 = 2.2908*10^-4

M(OH)2 <-> M+2 + 2OH-

Ksp = [M+][OH-]^2

Note that

2 mol of OH are per M so

[M+] = 1/2*[OH-] = 1/2*2.2908*10^-4 =1.145*10^-4

so

Ksp = [M+][OH-]^2

Ksp = (1.145*10^-4)(2.2908*10^-4)^2

Ksp = 6.008*10^-12

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