Asked by Sara
In the preparation of one liter of 2.5 M HCl solution, what is the volume of HCl
concentrated (37% w / w, d = 1.19 g / ml) to be used?
concentrated (37% w / w, d = 1.19 g / ml) to be used?
Answers
Answered by
bobpursley
Concentrated HCl is commonly 11.8M.
So you are diluting it 11.8/2.5 times, or 4.72 times. That means, you need one part conc HCl, and 3.72 parts water.
What is one part? 1000ml/4.72=2.118ml
so measure 2.2118ml*3.72=788.14 ml water, and add 2.118 ml of conc HCl slowly, stiring, wearing googles and gloves. Always do this under the vent hood, and always add acid to water.
So you are diluting it 11.8/2.5 times, or 4.72 times. That means, you need one part conc HCl, and 3.72 parts water.
What is one part? 1000ml/4.72=2.118ml
so measure 2.2118ml*3.72=788.14 ml water, and add 2.118 ml of conc HCl slowly, stiring, wearing googles and gloves. Always do this under the vent hood, and always add acid to water.
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