23.03.2023 - 11:41

Prepare 100 mL of 10 % w/w HCl from 37% concentrated HCl (density of 37% HCl = 1.19 g/ml).

Prepare {eq}100 mL {/eq} of {eq}\rm 10 % w/w HCl {/eq} from {eq}37% {/eq} concentrated {eq}\rm HCl {/eq} (density of {eq}\rm 37% HCl = 1.19 g/ml {/eq}).

Answers (1)
  • DJULIETA
    April 3, 2023 в 22:32

    To prepare 100 mL of 10% w/w HCl solution from 37% concentrated m HCl, we need to calculate the volume of concentrated HCl required and then dilute it with distilled water.

    Let's start by calculating the mass of HCl required to prepare 100 mL of 10% w/w HCl solution:

    Mass of HCl = (10/100) x 100 g = 10 g

    Next, we need to calculate the volume of 37% concentrated HCl required to obtain 10 g of HCl:

    Density of 37% HCl = 1.19 g/ml Mass of 37% HCl in 1 ml = 1.19 g/ml x 0.37 = 0.4403 g/ml Volume of 37% HCl required to obtain 10 g of HCl = 10 g / 0.4403 g/ml = 22.7 ml

    Therefore, we need 22.7 ml of 37% concentrated HCl to prepare 100 mL of 10% w/w HCl solution. To prepare this solution, we should measure out 22.7 ml of the concentrated HCl using a graduated cylinder or pipette, and then add it slowly to 80 mL of distilled water in a clean and dry container. Mix it thoroughly until the HCl is completely dissolved in water, and then adjust the final volume to 100 mL by adding more distilled water if necessary.

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