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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: msam32 on February 11, 2023, 02:13:56 AM

Title: Experiment modification ideas
Post by: msam32 on February 11, 2023, 02:13:56 AM

Completing a sodium hydrogen carbonate (bicarb soda) decomposition experiment for school to get the empirical formula.
Need help with making some (2-3) modifications to this experiment. Thinking about changing the temps to prove a reliable relationship between heat + faster rates of decomposition. Any ideas appreciated.

Method will be this:

- 1. Empirical formula
 
Aim: To Calculate the Empirical Formula of Sodium hydrogen carbonate
 
Equipment: Scales  Bicarb soda  heat proof plate Oven spoon
 
Method:  1. Set the oven at 200oC.
     2. weigh the plate and record the mass.
     3. Add about 15g bicarb soda (sodium hydrogen carbonate) to the plate and record 
mass.
     4. Place plate in preheated oven and leave for 15 minutes.
     5. Remove and allow to cool for 10 minutes. Observe the appearance of the chemical.
     6. Weigh again.

Thanks  :)

Title: Re: Experiment modification ideas
Post by: Hunter2 on February 14, 2023, 01:25:47 AM

With this you get only a weight lost, but no formula.
I think you need some titration.
Also treat with acid and collection  of the gas ( which one)
Maybe also gravimetric Experiment to get carbonate as Barium salt.