any ideas? For the working portion of your lab final exam you will design an exp

Question

any ideas?

For the working portion of your lab final exam you will design an experiment to answer the following question. When heated sodium bicarbonate will decompose. The three possible paths for decomposition are given below. You will design an experiment to determine which of the following paths the decomposition proceeds by. You will be given 2.0 g of sodium bicarbonate and decompose it. You will need to have the method for the experiment outlined when you come to the lab sodium bicarbonate (s) sodium hydroxide (s) + carbon dioxide (g) sodium bicarbonate (s)-, sodium oxide (s) + carbon dioxide (g) + water (g) sodium bicarbonate (s) sodium carbonate (s) + carbon dioxide (g) + water (g) In your lab that day you will turn in your preliminary work on the experiment and the data and conclusions, including the problem setup

Explanation / Answer

a)

you must relate molar masses to the "lost" mass

always compare leftover mass with the initial mass

NaHCO3 = NaOH + CO2

NaHCO3 = NaO + CO2 + H2O

2NaHCO3= Na2CO3 + CO2 + H2O

then.. recall that CO2, H2O are volatiles, you must account them

always relate

leftover mass --> change to moles via molar mass

compare with moles of NaHCO3 initially

if they relate, then compare to the leftover mass of CO2 and if appicable, of H2O

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