Chem Activity (Answer) - Chemistry for Industrial Technologists.pptx

Chemistry

1. Activity 1 Mixture Observation after stirring and mixing Heterogeneous or Homogeneous Separate after standing? Tyndall Effect? A (Sugar) Dissolved   Homo No  Yes  B (Cornstarch) Did not dissolved  Hetero  Yes  No C (Dirt) Did not dissolved   Hetero  Yes  No D (Food color)  Dissolved  Homo No   Yes E (Oil)  Did not dissolved  Hetero  Yes  Yes F (Milk)  Dissolved (It does not actually dissolves)  Hetero  No  No

2. Sample a Sample b Sample c Sample d Sample e Sample f  No Yes  Yes  No  Yes  No  Questions: Heterogeneous mixtures are mixtures which composition is not uniform throughout the mixture. While, homogeneous mixtures are mixture whose composition are uniform throughout the mixture The solute is the cornstarch and the solvent is the water

3. 3. Suspensions are heterogeneous mixtures where solid particles do not dissolve in a liquid solution. Solution B (cornstarch) and Solution C (Dirt). 4. Colloids are heterogeneous mixtures whose particles do not dissolve but they go to 1-1000 nm in size thus it not separating when standing and filtration. Solution F (Milk) is a colloid. 5. Solutions are homogeneous mixtures solute particles completely dissolves in the solvent. Mixture A (sugar) and Mixture D (Food color)

4. 6. The least dense would be the oil thus it floating on the water. 7. Solutions and colloids

5. Activity 3 List the five main points of Dalton’s Atomic Theory 1. All matter is made up of atoms 2. Atoms of the same element are identical 3. Atoms cannot be created, divided or destroyed 4. Atoms combine in simple whole-number ratios 5. During chemical reactions, atoms rearrange but no atoms are created, divided nor destroyed

6. Basic Laws of Matter 1. C 2. A 3. B Atomic Structure

7. Subatomic Particles Chemical Formulas 1. Simple/simplest 2. True 3 Arrangement/ bonds Particle Charge Location Proton  Positive Inside the nucleus  Electron  Negative  Outside the nucleus Neutron  Neutral  Inside the nucleus

8. Subatomic Particles Chemical Formulas 1. Simple/simplest 2. True/ Whole 3 Arrangement/ bonds Particle Charge Location Proton  Positive Inside the nucleus  Electron  Negative  Outside the nucleus Neutron  Neutral  Inside the nucleus

9. Naming Compounds 1. Zinc (III) oxide 2. Diselenium monoxide 3. Lithium hydroxide 4. Rubidium hydroxide 5. Nitric acid 6. Tin chloride 7. Nitrous oxide 8. Tribromine tetrachloride

10. Activity 4

11. 68 g/mol

12. Activity 5 As seen on the video, as the plunger of the syringe is pushed down it increases the pressure thus causing the volume of the balloon to decrease. While, if the plunger of the syringe is pulled in decreases the pressure causing for the volume to increase. Thus, the volume of the gas is inversely proportional to the pressure (Boyle’s Law) As seen on the video, when the liquid nitrogen (a cold substance) was poured into the balloon it caused for the balloon to be crumpled. It shows that as the temperature decreases the volume of the gas inside the balloon decreased. While, on the other video, as the balloon was putted on the boiling water inside the beaker, it caused for the balloon to increase in size. It shows that as the temperature increases the volume of the balloon also increases. Thus, the volume of the gas is directly proportional to the temperature (Charles’ Law).

13. QUESTIONS As the pressure of the gas increases as the volume decreases. The volume of the gas decreases when its cooled and when it is heated it increases.

14. QUESTIONS As the pressure of the gas increases as the volume decreases. The volume of the gas decreases when its cooled and when it is heated it increases.

15. Activity 6 & 7

16. 1.Sodium 2. Ruthenium 3. Cadmium 4. Lead 5. Seaborgium