Question
In: Chemistry
A)Write the two mathematical equations using the experimental quantities of your experiment. You must remember that...
A)Write the two mathematical equations using the experimental quantities of your experiment. You must remember that both equations must have identical units for both sides of your two equations.
I need help regarding my lab assignment, I have no idea how to approach the calculations. The following table is the "Mass data for reaction of NaHCO3-Na2CO3 mixture with HCl"
| Mass of crucible and cover (g) | 24.6073 |
| Mass of crucible, cover and mixture (g) | 25.1200 |
|
Mass of crucible, cover, and residue after reaction with HCL
(g) |
25.0927 |
| 2nd weighing | 25.0914 |
| Mass of unknown mixture used (g) *found via my own calculations | 0.5127 |
A)Write the two mathematical equations using the experimental quantities of your experiment. You must remember that both equations must have identical units for both sides of your two equations.
I assumed that the two equations were Mass of mixture(g)= Mass of NaHCO3(g) + Mass of Na2CO3 (g) and Moles of NaCl= 2(moles of Na2CO3 in mixture) + 1 (mole of NaHCO3 in mixture). Please correct me if I am wrong.
B) I must solve these equations and calculate the mass of NaHCO3 and the mass of Na2CO3, and calculate the percent of NaHCO3 in the mixture.
C) The following table "Calculation of percent NaHCO3 and Na2CO3 in an unknown mixture" must be filled out as well, using the information given in the first table.
| Mass of unknown mixture used (g) | 0.5127 |
| Mass of NaCl formed (g) | ??? |
| Mass of NaHCO3 in unknown mixture (g) | ???? |
| Mass of Na2CO3 in unknown mixture (%) | ???? |
| Percent of Na2CO3 by mass in unknown mixture (%) | ???? |
| Average percent by mass of other elements in unknown sample (%) | ???? |
Solutions
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