Purpose: To gain practice working with lab equipment, and taking measurements such as mass, temperature, length mass in the laboratory. Practice converting found measurements into different units, such as obtaining a temperature reading in Celsius and then converting it into Fahrenheit and Kelvin. As well as determining density, and how do dilute a solution.

Procedure:

1. Read the entire lab manual on laboratory techniques and measurements, being sure to fully understand the steps and procedures.

2. Make sure you have a clean and safe area to work, gather all the supplies listed in the materials section of the manual.

3. Beginning with the measurements, take a ruler and find the length in cm of a cd, key, spoon and fork. Once you obtain the measurements convert the units from cm to mm then from mm to m.

4. Next is temperature measurements, turn on your burner and set the stand over it, following the instructions gather your temperature readings in Celsius and convert them into Fahrenheit and Kelvin.

5. Mass measurements, estimate the mass of each object, then weigh the object and then convert the weight from grams to kilograms.

6. Using the graduated cylinder, obtain the weight of it empty, measure out 5 ml of water (2nd time use isopropyl alcohol) and weigh it again, obtain the mass of the liquid, find the density and the percent error.

7. Take mass of the magnet along with length, width and height and using the data to find the volume and the density.

8. Using the graduated cylinder measure out close to 5ml of water recording your exact amount, place the magnet/bolt into the cylinder and record the final volume, using the data find the volume and density.

9. Fill the glass beacker ¾ of water place it on the scale and zero the scale, tie a string around the bolt/ magnet carefully without touching the sides of the beaker place the object into the water and obtain the mass of the displaced water, complete the calculations

10. Weigh out 8 grams of sugar, find the molecular weight moles in volumetric flask total volume and molarity.

11. Follow each step to dilute the concentration of water, using the volumetric flask and the equation m1 X v1= m2 X v2 to find the final concentration.

Observations and Data:

Object

Length (cm)

Length (mm)

Length (m)

Cd

11.9 cm

119 mm

0.119 m

Key

5.3 cm

53 mm

0.053 m

Spoon

15.5 cm

155 mm

0.155 m

Fork

17.9 cm

179 mm

0.179 m

To convert cm to mm I moved the decimal point 1 place to the right because centi is 10^-2 and mili is 10 ^-3. To convert millimeter to meters I moved the decimal place 3 places to the left.

Water

Temperature °C

Temperature °F

Temperature K

Hot from tap

45°C

113°F

318.15K

Boiling

90°C

194°F

363.15k

Boiling for 5 minutes

100°C

212°F

373.15K

Cold from tap

20°C

68°F

293.15K

Ice water-1 minute

2°c

35.6°F

275.15K

Ice water- 5 minutes

0°C

32°F

273.15k

When taking a temperature of a boiling liquid be sure not to touch the thermometer to the sides of the glass beaker. To convert Celsius to Fahrenheit I took degrees Celsius and times it by 1.8 and then added 32. To convert to Kalvin I took degrees Celsius and added 273.15.

Object

Estimated Mass (g)

Actual Mass (g)

Actual Mass (kg)

Pencil

10g

5.5g

0.0055kg

3 pennies

1g

7.5g

0.0075kg

1 quarter

2 g

5.7g

0.0057kg

2 quarters 3 dimes

5g

18.1g

0.0181kg

4 dimes, 5 pennies

5 g

21.4g

0.0214kg

3 quarters, 1 dime, 5 pennies

10g

31.7g

0.0317kg

Key

10g

10g

0.01kg

Key,1 quarter, 4 pennies

15 g

25.6g

0.0256kg I found I am not very good at estimating mass the only one I was spot on with was the mass of the key which was 10g. To convert grams to kilo grams I moved the decimal point 3 places to the left.

Liquid

Volume (ml)

Mass A Graduated cylinder (g)

Mass B Graduated cylinder with liquid (g)

Mass B-A

Liquid (g)

Density g/ml

%error

Water

5ml

16.5g

21.7

5.2

1.04

4%

Isopropyl alcohol

5ml

16.6g

21.0

4.4

0.88

11.9%

To find the density you take mass and divide it by volume. To obtain the percent error you