Question

I am supposed to map out the following and can't figure out how to do it! Can somebody help? The experiment has to do with determining the simplest formula of potassium chlorate and to determine the original amount of potassium chlorate in a potassium chlorate-potassium chloride mixture by measuring the oxygen lost from decomposition.

The chemical reaction is 2KClO3(s) ------> 2KCL(s) + 3 O2(g)

I am supposed to map out

1. Mass of oxygen lost in the first part

2. Number of moles of oxygen atoms evolved

3.Mass of potassium chloride(residue)

4.Number of moles of potassium chloride

5.Number of moles of potassium atoms in potassium chlorate

6.Number of moles of Clatoms in potassiu chlorate

7.Number of moles of oxygen atoms in potassium chlorate

8.Simplest formula of potassium chlorate

Part b

1.Mass of unknown mixture

2.Mass of oxygen lost

3.Number of moles of oxygen atoms evolved

4.number of moles of potassium chlorate decomposed

5.Mass of potassium chlorate in original sample

6.Percentage by weight of potassium chlloare in unknown

here are the data tables.

Mass of test tube plus catalyst

Mass of test tube and catalyst plus potassium chlorate

Mass of test tube and catalyst plus potassium chloride residue Mass of test tube plus catalyst Mass of test tube and catalyst plus unknown mixture Mass of test tube and catalyst plus residue

Results table A

Mass of oxygen lost

Number of moles of oxygen atoms evolved

Mass of potassium chloride (residue)

Number of moles of potassium chloride

Number of moles of potassium atoms in potassium chlorate

Number of moles of chlorine atoms in potassium chlorate

Number of moles of oxygen atoms in potassium chlorate

Simplest formula of potassium chlorate

Part B calculations

O	Mass of unknown mixture
P	Mass of oxygen lost
Q	Number of moles of oxygen atoms evolved
R	Number of moles of potassium chlorate decomposed
S	Mass of potassium chlorate in original sample
T	Percentage by weight of potassium chlorate in unknown sample

Answer 1

Mass of test tube plus catalyst--------------------------------------------------------x

Mass of test tube and catalyst plus potassium chlorate------------------------y

Mass of test tube and catalyst plus potassium chloride residue--------------z Mass of test tube plus catalyst---------------------------------------------a Mass of test tube and catalyst plus unknown mixture------------------b Mass of test tube and catalyst plus residue-------------------------------c

Results table A

Mass of oxygen lost------------------------------------------------------------y-z

Number of moles of oxygen atoms evolved------------------------------y-z/16

Mass of potassium chloride (residue)--------------------------------------z-x

Number of moles of potassium chloride-----------------------------------z-x/74.55

Number of moles of potassium atoms in potassium chlorate--------y-x/122.55

Number of moles of chlorine atoms in potassium chlorate-----------y-x/122.55

Number of moles of oxygen atoms in potassium chlorate------------y-x/40.85

Simplest formula of potassium chlorate

Part B calculations

O	Mass of unknown mixture-----------------------------------------------b-c
P	Mass of oxygen lost-------------------------------------------------------b-c
Q	Number of moles of oxygen atoms evolved-------------------------b-c/16
R	Number of moles of potassium chlorate decomposed------------(2/3)*(b-c/16) = b-c/24
S	Mass of potassium chlorate in original sample----------------------{(b-c)/24)*122.55
T	Percentage by weight of potassium chlorate in unknown sample510.625 * {(b-c)/(b-a)}