What is the mole fraction of solute and the molal concentration for an aqueous solution that is 19.0% NaOH by mass?

Question

aaronq · Answer

19.0% NaOH by mass means that there is 19 g of NaOH in 100 mL of water.

use the formulas for molality and mole fraction.

anonymous · Answer

So, what is the Solute and what is the Solvent in this question?

aaronq · Answer

NaOH is the solute water is the solvent

Note: the one that is less is always the solute.

anonymous · Answer

So do I need to change the 19g and 100 mL to moles, then plug it into the equation?

aaronq · Answer

for mole fraction, yes. for molality, only convert the solute to moles.

anonymous · Answer

I tried all that and I still cant get the right answer. Any other hints anyone can give me?

aaronq · Answer

can you post what you did?

goformit100 · Answer

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