Homework Help: Chemistry

Posted by Sheena on Saturday, March 17, 2012 at 8:47pm.

I am working on a redox stoichiometry lab. I need to calculate the moles NaBO3*4H2O.

Mass=1.0133g in 100mL solution

In my experiment I used 9.98mL and titrated in with KMnO4.

I'm really confused about how to calculate the moles. Thanks for any help!!!!

Chemistry - DrBob222, Saturday, March 17, 2012 at 8:53pm
Write the equation and balance it. Do that first.
Chemistry - Sheena, Saturday, March 17, 2012 at 9:05pm
I calculated the M of NaBO.... at 6.59x10^-3 for the mass I measured. I have a chart of measurements where I used 9.98mL out of 100mL of solution that I made. I was given the equation

(mass Na.../molar mass Na...)*(volume Na.../volume total solution)

the balanced equation I'm totally stuck.
Chemistry - DrBob222, Saturday, March 17, 2012 at 10:20pm
I need more information than that. For moles NaBO3.3H2O = grams/molar mass.

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