Chemistry
When doing calculations for a lab report, each calculation should include the following:
Below is a sample of what the lab calculations section of your lab report should look like.
Calculations
1. Mass of NaHCO3 = (Mass of dish w/ NaHCO3 ) – (Mass of dish)
= 43.72 g – 41.01g
= 2.71 g
mass 2.71 g
2. Moles of NaHCO3 = ------- = ------------------ = 0.0323 moles
MW 84.0059 g/mol
3. Mass of NaCl = (Mass of dish w/ NaCl) – (Mass of dish)
= 42.86 g – 41.01 g
= 1.85 g
m 1.85 g
4. Moles of NaCl = ------- = ----------------- = 0.0317 moles
MW 58.443 g/mol
moles of NaCl 0.031655 moles
5. Ratio = --------------------- = --------------------- = 0.981
moles of NaHCO3 0.032260 moles
| Accepted value – Exp. Value | | 1 - .98125 |
8. Percent error = -------------------------------------- x 100 = ----------------- x 100 = 1.88 %
Accepted Value 1
Notice that: