Conclusion
Data Table and Graph
Cause and Effect of Reaction
Variable results
- We conclude that after adding 50 ml of citric acid, the chemical reaction was not only bigger, but the temperature dropped more slowly.
- In addition our hypothesis was wrong, the temperature still decreased but by not as much as trail one. So we can infer that by adding more citric acid (our changed variable) that this somehow slowed the cooling of the liquid through the chemical reaction.
Flaws in our experiment
Introduction
Trial 1- nothing was
changed
Trial 2- we increased
the citric acid from
25ml to 75ml
- The height of the bubbles rose higher in trial two because we tripled the amount of citric acid in our experiment
- With more citric acid the temperature did not drop as much as it did in trial 1 (as seen on graphs)
Procedure
Cause:
The cause is the reaction between the baking soda and the citric acid.
Reaction:
The reaction causes the temperature to drop (as seen in our tables), and bubbles to form, and rise above our cup. This is called a chemical reaction (3NaHCO3 + C6H8O7 --> C6H5Na3O7 + 3CO2 + 3H2O)
- The one crucial flaw in the experiment was that the cup was too short to accurately record how high the bubbles went.
- Another semi flaw could be is if the citric acid amount may have been wrong by us not measuring carefully.
- get a syrofoam cup and add 25ml of citirc acid
- measure 15g of baking soda
- set up logger pro to measure temperature
- get original temperature of citric acid
- add baking soda then get reaction temperature on logger pro by pressing start
- repeat steps but add 75ml of citric acid
Materials
- our project is a chemical reaction between baking soda (NaHCO3) and citric acid (C6H8O7)
- Today we will be telling you how our experiment worked out hypothesis, our materials, our data, and what could have gone wrong.
- Two styrofoam cups
- Logger pro (for temperature)
- Lemon juice (citric acid)
- Baking soda
- Ruler
Hypothesis
- We believe that when the citric acid is added, the temperature will rise and so will the height of the bubbles
Citric Acid and Baking Soda
A Brito, Polak, Scannell, Delucia Production