The weight of KOH are required to prepare 500. mL of 0.450 KOH solution is 12.6 gm
What is Molarity ?
Molar concentration is a measure of the concentration of a chemical species, in particular of a solute in a solution, in terms of amount of substance per unit volume of solution.
In chemistry, the most commonly used unit for molarity is the number of moles per liter, having the unit symbol mol/L or mol/dm³ in SI unit.
Molar mass of KOH = 39 + 16 + 1 = 56g
To make 1 L of 1M soln needs = 56g KOH
To make 500mL 1M needs 56/2 = 28g
To make 500mL 0.450 M needs = 28 x 0.450
= 12.6 gm
Therefore, The weight of KOH are required to prepare 500. mL of 0.450 KOH solution is 12.6 gm.
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