[jcais]

Hello,

I did the experiment: Decomposition of Potassium Chlorate.

Mass of KClO3 = 1.02g
Mass of unknown product = 0.739g
three possibilties:

KClO3 -> KCl + O2

KClO3 -> KClO + O2

2KClO3 -> 2KClO2 + O2

How do I find out the expected masses of each solid product using the mass of KClO3 = 1.02g?

Whatever it is should come close to the unknown product mass.
I set up each problem and got masses of the unknown in the hundreds.

Does anyone know how to set up the dimensional analysis problems? Thank you so much for your *delete me* :-)

[Borek]

Show your work so that someone can show you were you have gone wrong.

[AWK]

Thermal decomposition of KClO3 to KCl goes in two steps:
4KClO3 = 3KClO4 + KCl
Then
KClO4 = KCl + 2O2

Your reaction needs balancing

KClO3 -> KCl + O2

In your stoichiometric calculation take into account eventual mixture of KCl and KClO4

[lindeproctor]

2KCLO3> 2KCL + 302

1.02g KCLO3 * 1mol /122.55g * 2 mol KCL/ 2 mol KCLO3 * 74.551g/mol KCL = grams of product (KCL)