EXPT. 2
Reporter: Kyla Franchesca V. Venegas Instructor: Prof. Susan Torres
Section: 1-12 Date Performed: September 2, 2014
Group No.: 7 Date Submitted: October 3, 2014
Experiment 2 The Particulate Nature of Matter
INTRODUCTION
Matter is defined as that which has mass and occupies space. All matter is particulate in nature. This basically means that between separate bits of matter there are spaces which contain no matter. In science it is called the "atomic nature of matter." Democritus first suggested the existence of the atom but it took almost two millennia before the atom was placed on a solid foot hold as a fundamental chemical object. And that was how Dalton thought of the atomic theory. This experiment aims to understand that:
1. Matter is made of tiny particles.
2. There is empty space between the particles.
3. The particles are in constant motion.
4. There are forces that act between the particles.
METHODOLOGY Materials and Apparatus
CuSO4 (size of a rice grain)
Phenolphthalein indicator
Ammonia solution (1 M NH3)
Iodine crystals (I2)
Graduated cylinder
Procedure: Part 1 Diffusivity
1. Place a small amount of iodine in a beaker. Cover the beaker with a watch glass. Place a wet tissue paper on top of the watch glass. Then put it inside of the fume wood.
2. Heat the beaker inside the fume wood.
3. Observe the changes in the iodine. Compare this with the original iodine.
Part 2 Solubility
1. Fill the test tube with 3 ml of distilled water then put a few grains of CuSO4 crystals. Do not stir just observe the changes.
2. After observing, stir the mixture and observe again.
Part 3 Permeability
1. Put 50 ml of distilled water and 5 ml of ammonia
Section: 1-12 Date Performed: September 2, 2014
Group No.: 7 Date Submitted: October 3, 2014
Experiment 2 The Particulate Nature of Matter
INTRODUCTION
Matter is defined as that which has mass and occupies space. All matter is particulate in nature. This basically means that between separate bits of matter there are spaces which contain no matter. In science it is called the "atomic nature of matter." Democritus first suggested the existence of the atom but it took almost two millennia before the atom was placed on a solid foot hold as a fundamental chemical object. And that was how Dalton thought of the atomic theory. This experiment aims to understand that:
1. Matter is made of tiny particles.
2. There is empty space between the particles.
3. The particles are in constant motion.
4. There are forces that act between the particles.
METHODOLOGY Materials and Apparatus
CuSO4 (size of a rice grain)
Phenolphthalein indicator
Ammonia solution (1 M NH3)
Iodine crystals (I2)
Graduated cylinder
Procedure: Part 1 Diffusivity
1. Place a small amount of iodine in a beaker. Cover the beaker with a watch glass. Place a wet tissue paper on top of the watch glass. Then put it inside of the fume wood.
2. Heat the beaker inside the fume wood.
3. Observe the changes in the iodine. Compare this with the original iodine.
Part 2 Solubility
1. Fill the test tube with 3 ml of distilled water then put a few grains of CuSO4 crystals. Do not stir just observe the changes.
2. After observing, stir the mixture and observe again.
Part 3 Permeability
1. Put 50 ml of distilled water and 5 ml of ammonia
References: 1. Jaffe, Bernard Crucibles: The Story of Chemistry revision 1978 p. 88-89 2. Brown, T.L., Lemay H.E Jr., Burstein B.E. Chemistry The Central Science 6th ed. Prentice Hall International UK 1994 3. PBS & WGBH Educational Foundation, http://www.pbslearningmedia.org/resource/lsps07.sci.phys.matter.naturematter/particulate-nature-of-matter/#, date visited: September 19, 2014 4. Author, http://www.chemteam.info/Matter/ParticleNatureMatter.html, date visited: September 19, 2014 5. Author, http://www.answers.com/Q/What_happens_to_iodine_crystals_when_heated, date visited: September 19, 2014 6. Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton 7. CAMEO Chemicals, http://cameochemicals.noaa.gov/chemical/24008, date visited: September 19, 2014 8. Oxford English Dictionary (3rd ed.). Oxford University Press. September 2005.