Homework Help: College Chemistry

Posted by Elleni on Friday, October 22, 2010 at 12:05am.

A student weighs out 0.568 g of KHP (molar mass=204g/mol) and titrates to the equivalence point with (36.78 cm cubed which is 3) of a stock NaOH solution. What is concentration of stock NaOH solution? KHP is an acid with one acidic proton.

The word cubed is in word form because my computer does not have that symbol.

Thanks

College Chemistry - DrBob222, Friday, October 22, 2010 at 12:58am
You can do one or two things for that cubed symbol. You can write cm^3 (the caret means raised to the power in computer language), OR you can write the volume as cc. 36.78 cm^3 = 38.78 cubic centimeters = 38.78 cc. A cc = mL also.
mols KHP = grams/molar mass = ??
moles NaOH = same since KHP has one acidic proton and NaOH has one OH.
Then M NaOH = moles NaOH/L NaOH.

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