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Welcome x socialized x Dotson x D Extracred x M- Northern X C Potassiun x K A 3664 g x The 6 His x f (2) Faceb x D Local Job x X C sapling learning.com s/mod/ibis/v 3596987 /ibiscm iew.php?id 4/18/2017 11:55 PM A 47.1/100 Gradebook Assignment Information Attempts Score tr Print Calculator Periodic Table Available From Not Set Question 8 of 17 4/18/2017 11:55 PM Due Date: Map Sapling Learning Points Possible Grade Category: Homework Reset of phenolphthalein indicator dissolved in water. The buret Description: contains 0.280 M NaOH. 15 Homework (10 tries, no MC Policies deduct What vol ume of base is needed to reach the end point of the titration? 20 You can check your answers. Number You can view solutions when you complete or give mL base 25 up on any question. You have ten attempts per question. Assuming the acid is monoprotic, what is its molar mass? There is no penalty for incorrect answers. Add base to the solution until Number it just turns pink. You may need to reset the titration if g/ mol you go past the end point. eTextbook O Help With This Topic O Web Help & Videos OTechnical Support and Bug Reports O Previous Give up Vi solution check Answer ONext Exit 8:37 PM Search right here 4/18/2017

Explanation / Answer

Answer:

Given Acid amount=0.476 g, Conc. NaOH=0.280 M,

From the figure the volume of base to reachend point = 18 ml.

If we assume acid is monoprotic,

N1V1=N2V2

(0.479/molar mass)*1000=0.280*18

molar mass=479/(0.280*18)

Molar mass=95.03 g/mol

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