AP Chem Lab Notebook

9/12/24 Partner: Jeff Somvorachith Lab 1. Physical and Chemical Changes Lab  Purpose: To ident...

Experiment D Place 5 drops of silver nitrate into a test tube. Add 5 drops of sod...

- There are some popping noises when heating and a smell is produced(water boiling smell). - Whe...

9/12/24-9/13/24 - End mixture is clear. - End mixture is 29oC. Experiment - It cooled by 30C. ...

milky, cloudy substance with chunks floating in it. Experiment D was a chemical reaction because ...

9/19/24 Partner: Jeff Somvorachith Lab 2. Mole Concept II Purpose: To practice using the mole...

Analysis: A. 3.07g/63.546 amu =0.0483 mol <-1.     0.0483 mol *6.022*1023=2.91*1022 atoms Cu. <...

10/11/24 Lab 3. Hydrated Compounds Purpose: To use hydrated compounds to practice calculating ...

Mass of crucible and hydrated compound: 16.08g Mass of crucible and anhydrous compound(first hea...

10/14/24 I get a ratio of 1:9.6 mol MgSO4:H2O, the correct ratio is 1:7. My results are pretty a...

10/15/24 Partner: Connor Engels Lab 4. Empirical Formula Determination Purpose: To determine ...

Data: Mass of tin: 2g Mass of tin, evaporating dish, and watching glass: 39.21g Mass after 1st...

10/16/24 Analysis: Mass of Sn 2.00 g/118.7 g/mol=0.0168 mol Sn 39.71g-39.21g=0.5g O mass O 0....

Partner: Jeff Somvorachith 10/31/24 Lab 5. Reactions in Solution Precipitation Purpose: To pr...

solutions to the proper location. Some of the solutions contain transition metal ions, so should ...

Conclusion: a. Formula of Precipitates CoCl2 CuCl2 AlCl3 BaCl2 NiCl2 NaI ...

11/1/24 c. Net ionic formulas Cu2++2I+->CuI2  Co2++Co32-->CoCO3 Cu2++Co32+->CoCO3 2Al3++3CO3...

Partner: Jeff Somvorachith 11/4/24 6. Stoichiometry and Limiting Reagent Purpose: To practice...

The tape on our beaker burned. Took about 1 minute 50 seconds to dissolve. Letting off steam. See...

3. Water was added to remove any underacted copper(II) sulfate, iron, and iron(II) sulfate. The s...

was left over after and what was left over was the limiting reactant. The limiting reactant turne...

11/7/24 Partner: Jeff Somvorachith 7. Standardization of a NaOH Solution Purpose: To determin...

7. Calculate the percent deviation between the trials. % deviation=(highest molarity - lowest mo...

Analysis:   KHC8H4O4+NaOH->NaKC8H4O4+H2O Trial 1: 10.00mL-0.20mL=9.80mL NaOH used 2.00g/(39.10...

Our % deviation was 0.990%, meaning our answers between each trial was pretty close to the averag...

11/12/24 8. Vinegar Titration Lab Purpose: Determine the concentration of acetic acid in vineg...

Data: Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 Trial 6 Amount of vinegar 1...

Trial 4: 34.4mL-26.2mL=8.2mL (8.2/1000)/(10mL/1000)=0.82M Trial 5: 42.65mL-34.4mL=8.25M (8.2...

Conclusion: The purpose of the lab was to determine the concentration of acetic acid in vinegar....

12/3/24 9. Molar Volume of a Gas Purpose: To practice calculating the molar volume of a gas by...

 Clamp the eudiometer into position on the ring stand. The acid flows down the tube(less dense) a...

Started slowing down as magnesium disappeared. Some HCl went out the stopper. Some bubbles stuck ...

The formula for the Mg HCl reaction is Mg+2HCl->H2+MgCl2. Since the moles of Mg equal the moles o...

Partners: Jeff Somvorachith, Connor Engels 10. Additivity of Heats of Reaction: Hess's Law Purp...

8. Rinse and dry the temperature probe, cup, and stirring rod. Dispose of the solution as directe...

ΔHR1= -1.875 kJ ΔHR2= -4.678 kJ ΔHR3= -2.865 kJ molR1=2.00/(22.99+16.00+1.008)= 0.05 mol mo...

We ended up with a 1.28% error, meaning some heat was probably lost, though it was close. This er...