29.2 %( w / w ) HCl stock solution has a density of 1.25 gmL ⁻¹ . The molecular weight of HCl is 36.5 ~g ~mol ⁻¹ . The volume ( mL ) of stock solution required to prepare a 200 mL solution of 0.4 M HCl is :

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Molarity of stock solution of HCl = 29.2 1000 1.25 100 36.5 Let the volume of stock solution required =V ~mL Thus, V 29.2 1000 1.25 100 36.5 =200 0.4 V=8 ~mL

29.2 %( w / w ) HCl stock solution has a density of 1.25 gmL ⁻¹ . The molecular weight of HCl is 36.5 ~g ~mol ⁻¹ . The volume ( mL ) of stock solution required to prepare a 200 mL solution of 0.4 M HCl is :

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