1. if you have a weighing scale you can directly determine the weight of the sample used in the
experiment. if none, you can estimate the weight of the sample. from the baking soda
container, get the net weight of baking soda and determine how many tablespoons of baking
soda are in the container from the nutrition facts (serving size in teaspoons and no. of
servings). get the weight of baking soda in 1/4 teaspoon.
net weight of baking soda in one container (g):
no of teaspoons of baking soda in one container:
weight of 1/4 tsp of baking soda: __
2. volume of co2 produced (ml):
questions:
1. write a balanced chemical equation for the chemical reaction.
2. in this experiment, which reactant is limiting?
3. which reactant is in excess?
4. what is the molar mass of nahco3?
5. how many moles of nahco3 are there in 1/4 tsp of sample?
6. how many moles of co2 should be produced from the sample?
7. how many moles of co2 are actually formed? we can predict for the volume by using the ideal gas
equation pv=nrt, where p-pressure, v=volume, n=number of moles, r-ideal gas constant, 0.0821
l-atm/mol-k, t-temperature. this equation can be rearranged to get the number of moles in a
specific volume of gas: n=pv/rt; where p= 1 atm, v=volume of carbon dioxide produced
converted to liters; r=0.0821 l-atm/mol-k; t=298 k (room temperature)
8. calculate for the percentage error of the experiment.