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Chem Lab Report 1

Experiment 1: Density| Purpose: To determine the density of the following liquids and solids. Data/Observation: Part A Sample| Distilled Water (g)| Methanol (g)| Glycerol (g)| Mass of empty cylinder| 41. 1 g| 40. 4 g| 41. 1 g| Mass of cylinder + liquid| 51. 2 g| 48. 2 g| 53. 8 g| Mass of liquid| 10. 1 g| 7. 8 g| 12. 7 g| Calculations: Density of liquid = Mass/Volume = g/mL Distilled Water = 10. 1g/10mL = 1. 01 g/mL Methanol = 7. 8g/10mL = 0. 793 g/mL Glycerol = 12. 7g/10mL = 1. 27g/mL

Data Observation: Part B Sample| Sucrose| Sodium Acetate| Naphthalene| Mass of solid (g)| 5g| 2g| 2g| Volume of water (50mL)| 50mL| 50mL| 50mL| Volume of water & solid (mL)| 53mL| 52mL| 52mL| Volume of solid (mL)| 3mL| 2mL| 2mL| Calculations: Density of solid = mass/volume = g/cm3 Sucrose = 5g/3mL = 1. 6 g/cm3 Sodium Acetate = 2g/2mL = 1g/cm3 Naphthalene = 2g/2mL = 1g/cm3 Discussion: During the course of the experiment, the masses of distilled water, methanol and glycerol were taken.

After the masses were taken, the densities of each liquid were calculated. Results showed: * Distilled water – 1. 01 g/mL * Methanol – 0. 793 g/mL * Glycerol – 1. 27 g/mL Thus, the results showed that glycerol was the densest, methanol was the least dense and with distilled water being pure, its density was 1. The same procedure was done for solids. We calculated the densities of 5g of sucrose, 2g of sodium acetate and 2g of naphthalene. The results showed * Sucrose – 1. 6 g/cm3 * Sodium acetate – 1g/cm3 Naphthalene – 1g/cm3 Sucrose came out to be the densest out of the solids and sodium acetate and naphthalene’s densities were both 1g/cm3. Some factors that may have altered the outcome would be human and instrumental error. Human error could be caused by things like misreading the graduated cylinder when measuring out liquids. Instrumental error could have occurred when weighing solids. Residue of other solids may have already been on the weight paper or scale which may have added to the measurement.

CONCLUSION: It was concluded that the densities of the following liquids and solids were determined. Questions & Answers: 1. Salad oil rises to the top of the vinegar in salad dressing because the salad oil is less dense than the vinegar. When two liquids or materials of different densities are put together; the densities control how each liquid or material order themselves in a mixture. 2. The density of water is approximately 1. 00g/mL.

Since the cottonseed oil settled to the top the density would be less than 1. 00g/mL, and because the carbon tetrachloride settled at the bottom it should be denser than 1. 00g/mL. 3. The size of an object or the amount of liquid does not define its density. The feathers are a much lighter burden than the nails simply because the feathers are less dense than the nails. Even though they may occupy the same amount of space in the shopping bag, it does not mean that they will have the same density.