Technological Institute of the Philippines
938 Aurora Blvd., Quezon City
Experiment no. 2
Group No.2 of Section ES11FB4
Davis Banoog 1:30 4:30
Jenny-Ann Cabrera 1:30 4:30
Luis Miguel Benitez 1:30 4:30
July 05, 2013
July 27, 2013
Engr. Renato Agustin
1.1To be able to measure objects using the metric scale and convert the measurements
into English scale.
1.2To be able to appreciate the usefulness of measurements in Chemistry.
APPARATUS AND MATERIALS:
1 Bunsen burner
1 wooden block
Chemistry as a quantitative science requires knowledge of measurement. Two
systems of measurements are often using in scientific studies- the metric systems and the
English system. The metric system or international system of measurement is now popularly
In system of measurement, it is important to distinguish between the physical
quantities and the units of measurements.
The following are the seven fundamental units of measurements: length (meter),
mass (kilogram), time (second), electrical current (ampere), temperature (Kelvin), amount of
substance (mole), and luminous intensity (candela).
Accuracy refers to the closeness of measurements to the accepted value for a
specific quantity. On the other hand, precision is the agreement among several
measurements that have been made in the same way.
Measurement of physical quantity is always subject to some degree of uncertainty
that can be attributed to three factors; the researcher, the method and the instrument.
The degree of uncertainty can be express in term of accuracy. It is express as either
absolute relative error.
| EV-AV |
1. Measurement of Physical Quantities
1.1 Secure from the laboratory technician the above listed objects. Measure the
objects in metric scales and convert the measurements into English scale. Use
the table for your data.
1.2 Make three trials of measurements for each object and get the average
1.3 Round off your answer to three decimal places.
1.4 Record the date measured on the table provided the next page.
1.5 Show your solution.
2. Length (diameter)
2.1 Get a watch glass then mark its 2 opposite sides, passing through the
2.2 Using a ruler, measure the distance between the two points. That is the
diameter. Record it as T1.
2.3 Repeat steps 2.1 and 2.2 using two more pairs of opposite points. This will
serve as T2 and T3. Take the readings accurately and record on the table.
3. Volume of a Liquid
3.1 Measure 25mL of water in beaker and record the volume.
3.2 Transfer the liquid to a 50mL graduated cylinder. Record the volume
4. Area and Volume
4.1 Get a wooden block measures its length and width. Solve for the area.
4.2 Proceed to the measurement of height. Solve for the volume.
5. Mass and Density
5.1 Weight the wooden block and record its mass.
5.2 Solve for the density of the wooden block using the volume obtained in
6. Density of an irregular solid
6.1 Weight a stone and record its mass.
6.2 Measures 25mL of water using a graduated cylinder. Record its initial
6.3 Drop the stone along the side of the graduated cylinder. Record the final
6.4 Get the volume of the stone. (Final Volume – initial Volume = Volume of
6.5 Solve the density of the stone.
7.1 Set up the apparatus as shown.
7.2 Pour 50mL of water in the beaker.
7.3 Get the initial temperature of water and record it on the table.
7.4 Bring the water into the boiling and record the final temperature.
DATA AND RESULTS:
ANALYSIS AND INTERPRETATION:
OBJECT MEASURED PHYSICAL
T1 T2 T3 AVERAGE
Watch Glass Diameter cm 10 9.9 10 29.9
Inch 4 4.7 4 12.7
Water Volume (mL) Beaker 25 25 25 75
Graduated Cylinder 22 22 22 66
Wooden block Area cm2 50 50 50 150
in2 8 8 8 24
cm3 2.500 2.500 2.500 7.5
in3 0.020 0.020 0.020 0.06
Wooden Block Mass G 19.2 19.2 19.2 57.6
Lb 0.042 0.042 0.042 0.027
Stone Mass G 4 4 4 12
Lb 0.009 0.009 0.009 0.027
Water Volume (mL) Initial 22 22 22 66
Final 23 23 23 69
Stone Volume (final-initial) 1 1 1 3
temperature °C 69 85 90 244
Boiling point is a physical property. Boiling point is used by scientist to identify
unknown liquids because each liquid has a slightly different boiling point. Another reason
scientists use boiling point is because you don’t have to change the chemical formula to find
the boiling point. This makes the boiling point unique and specific to each substance. We
used water in the lab to heat the liquids. Because water has a boiling point of 100°C, we
could not find the boiling point of any substance that has a boiling point over 100°C.
To measure the volume (cm3) of the wooden block you need to multiply the length,
width and the height. To measure the volume of the rock which is irregular in shape we
used the water displacement method. The water displacement method is a technique used
to measure the volume of objects by calculating how much water it displaces, or pushes
aside when it's placed into a sample of water. You determine the volume by subtracting the
volume of the water without the object from the new measurement with the object - it will be
the difference between the two. Typically it's done in a graduated cylinder or other
measuring device you can more easily determine the difference.