Pre lab report experiment 1 PDF

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pre lab report for determination of sugar content experiment...

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Determination of sugar content Experiment 1 Experiment performed on: 2/15/2021 Amjad Samra lab partners: Adam Benavidez, Adan, Lisa, Allison and Douglad Chem1215L section 12 Hypothesis: The molarity/sugar concentration of a soda drink is determined by the density of the soda drink. The relationship between the molarity of sugar and the density is linear. Therefore, we can determine the sugar content of a soda from density measurement by interpolation of the density-molarity calibration curve.

Chemicals and hazards:

Chemical name: sucrose

Chemical name: water

Molecular formula: C12H22O11

Molecular formula: H20

Molar mass: 342.3g/mole

Molar mass: 18.02g/mole

Concentration/amount used:

Concentration/amount used:

34.23g of sucrose

500ml of water

 Hazards of sucrose: Nuisance dust. Inhalation of high concentrations may cause coughing and upper respiratory tract irritation. Ingestion: Extremely large oral dosages may produce gastrointestinal disturbances

 Hazard of water: No serious hazards.

 Precautions and protection: Wear safety goggles, and gloves always while in the lab and stick to the dress code of the lab.  Disposal and clean up: clean any leftover sucrose on the counter and the floor, and dump any solution other than water in the waste disposure. If you spill any chemical on you stand under the safety shower in the lab, and pull the handle to get it off your body.

Lab safety:  Recognize hazards: 1. Eye contact: Immediately flush eyes with plenty of water, occasionally lifting the upper and lower eyelids. Check for and remove any contact lenses. Get medical attention if irritation occurs. 2. Inhalation: Remove victim to fresh air and keep at rest in a position comfortable for breathing. Get medical attention if symptoms occur 3. Skin contact: Flush contaminated skin with plenty of water. Remove contaminated clothing and shoes. Get medical attention if symptoms occur.  Reduce risk: 1. When in the lab, one must always wear safety goggles, gloves, and appropriate clothing that exposes the least possible amount of skin.

Materials used for the experiment:    

Analytical balance Graduated cylinder Volumetric flask Burette

Experimental procedure for creating 1.0M of stock solution: 1. Obtain 34.23g of sucrose/sugar by weighing it in an analytical balance

2. Set the analytical balance to zero

3. Open the side door and put a certain amount of sucrose and weigh it out

4. Keep doing the same until you obtain 34.23g of sucrose

5. Dilute it in a graduated cylinder

6. Add water (70 or 80 ml) and don’t add more water than the cylinder can hold

7. Pour it in a volumetric flask and add water until the solution reaches the line mark on the volumetric flask

8. Find the mass of an empty 100mL volumetric flask and 25mL volumetric flask. Record the values in your lab notebook.

9. Shake the volumetric flask so the solution dissolves almost completely

10.Dilute stock solution to smaller molarities(determine 3 or 4 molarities)

11. Use M1V1 = M2V2 (dilution equation) to determine volumeV1 of stock solution needed to make dilution.

12.After determining V1 go to the burette and pour the stock solution in it (take not of how much amount you pour)

13.Release solution to 25 ml volumetric flask

14.Add water until reaching the mark

15.Shake it

16.Weigh the solution and divide the mass by 25ml(V1) to get the value of density

17. Plug in the value of density into the correlation equation of the graph drawn on excel(density on the y-axis and molarity on x-axes) to get the value of x which is molarity....