I (1) Did your upper lip area feel warmer or cooler? (2) Was the stretching process endothermic or exothermic for the rubber band?

(3) Explain your reasoning.

II
(4) Amount of NaHCO3 used/measured out teaspoons

(4a) Observations on Sodium Bicarbonate

(4b) Is sodium bicarbonate water soluble?

(5) Observations on Acetic Acid (vinegar) solution

(6) Observations after the addition of the first tablespoon of vinegar to the sodium bicarbonate

(7) Total amount of HC2H3O2 solution used for the reaction to go to completion tbs

(8a) Overall observations on the reaction. [How was the CO2 gas production observed?]

(8b) How did you determine when the reaction was complete?
(Give at least 2 indications/observations).

(9a). Amount of NaC2H3O2 solid produced

(9b) Observations on Sodium Acetate:

(10) Complete the balanced equations for this reaction:

(a) HC2H3O2(aq) + NaHCO3(s)

(b) H2O(ℓ) + NaC2H3O2(aq) heat

(11) Is reaction 10a above a reaction? How do you know?

If yes, what type/classification?

(12) Is reaction 10b above a reaction? How do you know?

If yes, what type/classification?

III (13) Yes or no (before potato)?

(14) Yes or no (after potato)?

(15) Observations (signs of a reaction occurring):

(16) Potato is

(17) Write the reaction here

(18) Type (classification) of reaction

IV (19) Observations on metal (after reaction)

(20) Write the reaction here

(21) Type (classification) of reaction

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