Baking Soda (Nahco3canic Acid

Conservation of Mass
9/27/10
Block A5

Materials

* Baking Soda (NaHCO3) * Vinegar (acetic acid, CH3COOH, solution) * Ziploc bags * Weight boats * 100mL graduated cylinder * 150mL beaker * 400mL beaker * Balance

The purpose of this lab was to find the mass of the products and reactants and to show a chemical reaction between them. I will use our results to apply what we’re learning in class which consists of: intensive and extensive properties, physical and chemical change, homogeneous and heterogeneous mixtures and the conservation of mass. Thus, we will learn to utilize these scientific applications outside of the actual experiment.

To begin, I prepared a chart to record my data. The activity asked
| Initial Mass (g) | Final Mass (g) | Change in Mass (g) | Part 1 | .5g Baking Soda+3.48 Vinegar=3.98 Total

Observations: Fizzled, bubbles at the top, whitish and then diluted | 3.72 Baking Soda/Vinegar mixture

Observations: Foggy mixture, blended evenly on its own | .26 | Part 2 | .5 g Baking Soda+3.48 Vinegar=3.98
Carbon dioxide was released and was the main product as the vinegar and baking soda blended. In Part 1, it was released, but in Part 2 it was sealed tight and added on to the mass.
Mixing vinegar and baking soda changed the properties of the matter entirely and created a heterogeneous mixture. First, a new substance was formed (CH3COONaH2O+ CO2). Thus, the physical, chemical, extensive and intensive properties vary. The physical properties changed because the substance was now foggy and the chemical, as mentioned, was the blending of the two. The extensive was affected because the mass changed due to carbonation. An example of the intensive property would, again, be the color and quite possibly the boiling point and temperature, if given the chance to observe because this is a new