Part B: Percentage of Baking Soda in an Unknown Mixture UNKNOWN # Mass of test tube and beaker 9u,53g 98.15 g Mass of test tube, beaker and unknown mixture (before heating) Mass of unknown mixture used 97.419 Mass of test tube, beaker and residue (after heating) - 96. SS 97.61 Mass of H2CO3 released (take before heating - after heating) Show the calculation for the theoretical mass of baking soda, NaHCO3, present in the sample of unknown mixture below (using the mass lost during the reaction, see example 2): Mass of NaHCO3 Show the calculation for the percent of baking soda in the unknown mixture below: Percent of NaHCO3

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".