EC Mast gCh Homework gle Chrome https:// masteringchemistry.com 50126853 Session

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EC Mast gCh Homework gle Chrome https:// masteringchemistry.com 50126853 Session Chem 1500 F15 Help Close Homework #6 Problem 12.54 Resources previous l 3 of 9 l next Problem 12.54 Part A Answer the following for the reaction: How many milliliters of 0.200M NaOHsolution are needed to react with 42.0 mL of a 0.310 M NiCl2 solution? NiCl2(aq 2NaOH(ag) Ni(OH)2 (s) +2NaCl(aq) Express your answer with the appropriate units Value Units Submit My Answers Give U Incorrect, Try Again, 4 attempts remaining Part B How many grams of Ni(OH) are produced from the reaction of 55.0 mL of a 1.55 M NaOH solution and excess Nicl2? Express your answer with the appropriate units Value Units Submit My Answers Give Up

Explanation / Answer

NiCl2 + 2 NaOH -------> Ni(OH)2 + 2 NaCl

M1V1 /n1 = M1V2 /n2

0.31 * 42 / 1 = 0.2 * V2 / 2

V2 = 130.2 mL

number of mole of NaOH = 1.55 * 55 / 1000

number of moles of NaOH = 0.08525

2 moles of NaOH produces 1 mole of Ni(OH)2

0.08525 mole of NaOH produces 0.08525/2 mole of Ni(OH)2

= 0.04263 moles of Ni(OH)2

mass of NI(OH)2 = 0.04263*92.71g = 3.9522 g

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