How we can prepare 0.1M HCl solution without using dilution formula?

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You could create a molar solution rather than a dilution to prepare the 0.1M solution of HCl. By definition, molarity is moles of solute per liter of solvent. Therefore, to create a .1 M solution of hydrochloric acid, you would essentially have .1 moles of HCl per one mole solvent (which is usually water). 

To make a liter of simple molar solution from a dry reagent, you would multiply the desired molarity by the formula weight to determine how many grams to use. So, for HCL in this question, this would be:

36.51 g/mole x .1 moles /L = 3.65 g / L

In other words, you would add 1 liter of water to 3.65 grams of HCl.

I hope this helps! And, as always, practice safety in the lab! 

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