The balance and the graduated cylinder are two apparatus that are of importance in chemistry. The table balance is an instrument that measures the mass of an object while the graduated cylinder is an instrument that measures the volume of liquid. In this experiment students will know the relationship between mass, volume and density.
Course & Section________
The balance (platform, triple beam or analytical) and the graduated cylinder are two pieces of chemistry apparatuses used in measurement. The balance is used for measuring the mass of an object and the graduated cylinder is used to measure the volume of the liquid or irregular objects.
The Balance. Although the balance differs in appearance and details in operation, the basic principles of operation are similar.
Triple Beam Balance
The Graduated Cylinder. The graduated cylinder is the most frequently used apparatus in the measurement of the volume of liquids.
(a) To gain skill in the measurement of mass and volume.
(b) To design appropriate means to do accurate and precise measurement in relation to future seafaring life.
Platform balance, 100 ml graduated cylinder, 250-ml beaker, block of wood, set of weights, ruler, small stone
1) Measure the mass of a given objects by means of a table balance. Measure the volume of a regular shape such as a wooden block with a ruler. Measure the volume of object having irregular in shape such as stone with graduated cylinder using displacement method. Record your results on the table provided by your instructor.
2) Measure 100 ml of water in a 100 ml graduated cylinder. Read the volume using the lower meniscus. (Upper meniscus is used for colored solutions.)
3) Repeat the same activity two time by adding and removing water from the cylinder until the volume coincides with the 100 ml graduation. Record your results on the table provided by your instructor.
4) Compute for the density by dividing the mass by its volume. Record your results on the table provided by your instructor.
Record of Results:
Table 1: Measurement of the mass
Trial Mass of Small Stone Mass of 100 ml Graduated Cylinder Mass of Block of Wood
1 _________________ ____________________________ _____________
2 _________________ ____________________________ _____________
Total _________________ ____________________________ _____________
Average ________________ ____________________________ _____________
Table 2: Measurement of Volume
Trial Volume of Small Stone Volume of 100 ml Water Volume of Block of Wood
1 __________________ ___________________ __________________
2 __________________ ___________________ __________________
Total __________________ ___________________ __________________
Average _________________ ___________________ __________________
Table 3: Measurement of Density
Object Small Stone 100 ml Water Block of Wood
MASS __________ __________ ___________
VOLUME __________ __________ ___________
DENSITY __________ __________ ____________
% Of Error = ______
Prepared by: Jessie R. Agudo, B.S. Civil Engg'/Master of Arts in Teaching Mathematics
For Discussions/Problems: If problems- SHOW YOUR SOLUTION.
- Is the density of a material affected by it's size? Support your answer.
- Ships sink deeper in fresh water or in seawater/ Support your answer.
- Explain why a piece of iron may float in mercury but sink in water.
- A Nautical student measures a cube of lead to be 45.6 mm on each edge which has a mass of 408.90 grams. Calculate the density in g/cc.
- An Engineering student wants to calculate the density in g/cc of a piece of metal measuring 3.0 mm by 0.80 dm and by 30 mm having a mass of 8.0g. What is the density in g/cc.