Stoichiometry is a branch of chemistry that measures the quantity of chemicals in a reaction. This branch relies heavily on moles and balancing. A mole is a unit of measure for giant quantities. It is a number of atoms or molecules that is so large that it is only logical and convenient to use it for atoms and molecules. One mole is 6.02 x 1023 atoms or molecules. We call this Avogadro's Number. Furthermore, balancing chemical equations is the process of changing determining the coefficients in a chemical equation, making sure that nothing is created or destroyed. Stoichiometry allows scientists to determine the mass of any chemical in a chemical equation as long as the mass of one species of that equation is given. Scientists convert …show more content…
The clay triangle does not heat up, keeping the ring stand from getting hot.
Turn on gas, and close the windows of the bunsen burner.
It will not light with the windows open.
Use a striker to light the bunsen burner.
This is our only way to light the bunsen burner.
Open the windows and let the baking soda cook for thirty three minutes.
The decomposition of baking soda will not occur immediately.
Let the crucible and its contents cool down.
When hot, it is reacting, but after it cools down, the reaction is complete.
Weigh the crucible and its contents, subtracting the former’s weight, leaving the mass of the latter (3.07 grams)
This mass if the most crucial piece of data of the lab as it ultimately reveals what reaction took place.
11. Let sit for weekend, then take its mass again (2.4 g)
To observe any changes.
Data
Equation of Reaction 1 1NaHCO3(s)→ 1NaOH(s) + 1CO2(g)
Equation of Reaction 2
2NaHCO3(s)→1Na2CO3(s)+ 1CO2(g)+ 1H2O(g)
Equation of Reaction 3 2NaHCO3(s)→ 1Na2O(s) + 2CO2 (g)+ 1H2O(g)
Equation of Reaction 4
1NaHCO3(s)→ 1NaH(s)+ 1CO(g)+ 1O2(g)
Mass of …show more content…
That is almost exactly the mass predicted using stoichiometry for the solid in reaction two, which is 3.15 grams. The theoretical yields of the other reactions are very illogical because the percent differences are extensive. The solid yield is denser than sodium carbonate, indicating that it lost material - gas. However, visually, the amount of material in the crucible appears to be the same. There is no significant change to the amount of substance - it did not look like we lost half of its mass, or anything along those