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/ Chrome File Edit View History Bookmarks People Window Help 9 B Q 1) 60% C. Wed 8:23 PM Susan Staggs QE HDER DOO 0 0 0 - Week 8: Acid - Base Quiz: x As www.public.asu.edu/hjpbi x X LChem Lab 2 - Google Drive X a Chemistry question I Ches x XV Mail - Staggs, Susan Cox Susan G - CIA https:// ucdenver.instructure.com/courses/26714/quizzes/44932 CICHACOOH Submission Details: Time: 8 minutes CH5COOH Current Score: 12 out of 15 Kept Score: 12 out of 15 Question 4 O/3 pts A 1.2 M solution of a diprotic acid is titrated to neutralization with 46.7 mL of 0.19 M LiOH. How many mL of the acid are required to reach the equivalence point? You Answered 7.3900 Correct answers 17.6 (with margin: 0.05) Question 5 2/2 pts The indicator which will be used throughout the experiment is: Methyl Orange QualSch .pdf Show All xExplanation / Answer
The given concentration of acid= 1.2 M
If the acid is diprotic acid then the concentration of acid should be expressed as = 1.2 X2 N = 2.4 Normal
As each acid molecule will give two equivalents of protons
H2A --> 2H+ + A-
(as the ka value is not provided we will continue calcualtions as such
N1V1 = N2V2
2.4 X V1 = 0.19 N X 46.7 mL
V = 3.69 mL
Note : For acid base titrations involving weak acid or base we need ka and kb values.
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