Here is the basic procedure I can conjure up.
1- Take.. um... 100 grams of
.
2- Put it in a flask, and on the top, make a pipe arrangement (preferrably from glass) that allows evolved gases to move only though it.
3- Now lead the pipe into U- shaped tubes. Have the U-tubes filled with
and anhydrous
.
4- Now perform the heating reaction... Make sure the gases emanating pass through the
and
.
5- The change in weight of the
shows the mass of
that has come out and that of [latex]CaCl_2[latex] will tell you how much water has come out.
Using this method, you can measure the masses of the products. Now, what you must do is calculate from the mass, the number of moles of water and CO2 evolved.
And, For every mole of water, you can say that twice the number of moles of
were originally present.
Now, you'll know the 'Mr' of
, so you can easily find out the Mr of Na. Incase you're not sure how,
'Mr of Na' = Mr of NaHCO3 - (Mr of H + Mr of C + 3(Mr of O))
Incase you have some doubt about what I suggested, go on to clear it with the rest of the hypographers!
Good luck.
