Question

If 50.0 grams of HCl were dissolved in enough water to make a solution with a total volume of 5.0 liters, what would be the molarity of the solution?

Answer 1

If 50.0 grams of HCl were dissolved in enough water to make a solution with a total volume of 5.0 liters, then the molarity of the solution is 0.282M.

How do we calculate molarity?

Molarity of any solution will be calculated by using the below equation:

M = n/V, where

• n = moles of solute
• V = volume of solvent in L

Moles will be calculated by using the below equation:

n = W/M, where

• W = given mass = 50g
• M = molar mass = 35.45 g/mol

n = 50/35.45 = 1.41 moles

On putting values in the above equation, we get

M = 1.41mol / 5L = 0.282M

Hence required molarity of solution is 0.282 M.

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