AIM: To verify that mass-mass relationships hold by measuring the amount of NaCl produced.
by
frostflash (student)
Ilyas Shaikh IBDP -1
MASS-MASS RELATIONASHIPS
AIM: To verify that mass-mass relationships hold by measuring the amount of NaCl produced.
HYPOTHESIS: The fundamental law of chemical reactions is the Law of Mass Conservation (or Conservation of Mass). The law states that the total mass of reactants must equal the total mass of products for a chemical reaction.
EXPERIMENTAL SETUP AND BACKGROUND:
1. To perform a reaction using measured samples of reactants
2. To measure the mass of the products;
3. To note the mass - mass relationships for this reaction.
APPARATUS REQUIRED:
250 cm3 beaker
Bunsen burner
Graduated cylinder
Safety glasses
Spatula
MATERIALS REQUIRED:
Solid Na2CO3
- M HCl solution
PROCEDURE:
- I measured the mass of a clean dry 250 cm3 empty beaker to the nearest 0.01 gram.
- I transferred the Na2CO3 to the beaker using a spatula weighed out 3 grams of it. I measured the mass of the beaker and Na2CO3 to the nearest 0.01 gram and recorded it.
- I calculated the moles of HCl required to consume the Na2CO3 .
- I added the acid to my beaker slowly, observing any chemical and physical changes that occur.
- I heated the beaker on the Bunsen burner to saturate the solution.
- Next I placed my beaker in the hot air oven to allow excess liquid to evaporate.
- When the dry crystals were observed in the beaker, the beaker and its contents were weighed.
- Subtracted the mass of the empty beaker to get the mass of NaCl produced.
- Finally, I computed the expected mass of NaCl produced using a mass-mass problem calculation.
- I repeated the same process respectively with 4g and 5g of the carbonate.
