Sodium hydroxide reagent is often supplied as a 50% (w/w) liquid solution. What volume of this...


Sodium hydroxide reagent is often supplied as a {eq}\rm 50\%\ (w/w) {/eq} liquid solution. What volume of this concentrated reagent solution is required to prepare {eq}\rm 1.0\ L {/eq} of {eq}\rm 0.5\ N\ NaOH {/eq}? The density of {eq}\rm 50\% \ (w/w)\ NaOH {/eq} at {eq}\rm 20 ^\circ C {/eq} is {eq}\rm 1.5253\ kg/L {/eq}.


Normality is quite similar to molarity. The only difference is that the quantity of the solute is expressed in mole equivalents instead of moles. This is used commonly in representing the concentration of acids and bases where the mole equivalents refer to the number of {eq}\rm{H^+ }{/eq} or {eq}\rm{OH^- }{/eq} that can be produced by a mole of the acid or base.

Answer and Explanation: 1

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Important molar mass:

{eq}\rm{NaOH: 39.998\frac{g}{mole} }{/eq}

First, let's convert the {eq}50 \text{% (w/w)} {/eq} concentration to normality...

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Solute Concentration: Definition & Overview


Chapter 1 / Lesson 10

What is a solute? Learn the definition of solute concentrations. See examples of solute concentrations, their formulas, and units used to represent them.

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