A chemist prepares a solution of aluminum chloride (AlCl, by measuring out 40. g of aluminum chloride into a 100. mL volumetric flask andfilling the flask to the mark with water.Calculate the concentration in mol/L of the chemist's aluminum chloride solution. Be sure your answer has the correct number of significantdigits.mol/Lx10

Answered: A chemist prepares a solution of…

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter1: The Nature Of Chemistry

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Problem 127QRT

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A chemist prepares a solution of aluminum chloride (AlCl, by measuring out 40. g of aluminum chloride into a 100. mL volumetric flask and
filling the flask to the mark with water.
Calculate the concentration in mol/L of the chemist's aluminum chloride solution. Be sure your answer has the correct number of significant
digits.
mol/L
x10

Expert Solution

Step 1 To calculate

$G i v e n, a m o u n t o f A l C l_{3} = 40.0 g v o l u m e o f f l a s k f i l l e d u p t o m a r k = v o l u m e o f s o l u t i o n = 100.0 m L = 0.1 L m o l a r m a s s o f A l C l_{3} = 133.34 g / m o l w e a r e a s k e d t o c a l c u l a t e t h e c o n c e n t r a t i o n o f s o l u t i o n .$

Step 2 Formula used and calculation

$T h e c o n c e n t r a t i o n o f a l u m i n u m c h l o r i d e s o l u t i o n i s g i v e n b y, C = \frac{w}{M \times V (i n L)}; w h e r e, w i s g i v e n m a s s, M i s m o l a r m a s s, V i s v o l u m e a n d C i s c o n c e n t r a t i o n o f s o l u t i o n . N o w, C = \frac{w}{M \times V (i n L)} C = \frac{40.0 g}{133.34 g / m o l \times 0.1 L} C = \frac{40.0}{13.33} \frac{m o l}{L} C = 3.0 \frac{m o l}{L}$

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