Some Basic Concepts of Chemistry - Result Question 42

####42. 29.2 stock solution has density of 1.25gmL 1. The molecular weight of HCl is 36.5gmol1. The volume (mL) of stock solution required to prepare a 200 mL solution 0.4MHCl is

(2012)

Subjective Questions

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Solution:

  1. Mass of HCl in 1.0mL stock solution

=1.25×29.2100=0.365g

Mass of HCl required for 200mL0.4MHCl

=2001000×0.4×36.5=0.08×36.5g

0.365g of HCl is present in 1.0mL stock solution.

0.08×36.5gHCl will be present in 0.08×36.50.365=8.0mL



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