1. Faculty of Allied Medical Sciences General Chemistry (MGGC-101)

2. Measurements in Chemistry 1 Supervision: Prof.Dr.Shehata El-Sewedy Dr.Fatma Ahmed

3. Outcomes By the end of this lecture, the students will be able to 1-Recognize the Matter 2-Known the States of matter 3-Learn to properitiesof matter 4-Known the classification of matter 5-Differentiate between chemical and physical changes 6-Differentiate between homogenous and heterogeneous mixtures

4. Introduction • What is Chemistry? • 1-Chemistry: is the study of matter and its transformations. • It's important to learn chemistry if you are studying any branch of science because all branches of science involve matter and the interactions between types of matter. Students wanting to become doctors, nurses, physicists, dentists, pharmacists, and (of course) chemists all must study chemistry.

5. 2. Matter Any thing that has a mass and occupies volume.

6. gas solid liquid States of matter: i. Solid ii. Liquid iii. Gas rigid fluid fluid fixed shape no fixed shape no fixed shape fixed volume fixed volume no fixed volume

7. hydrogen burns in air to form water ► Matter can undergo physical or chemical changes: Physical change *Changeof state where each substance *Retains its chemical identity. e.g1. (ice  water  vapor) e.g 2. Chemical change Change in chemical identity. e.g1. rust of iron sugar dissolving in water e.g2.

8. Properties of matter: there are 2 types of properties: Properties of matter: there are 2 types of properties: 1-Chemical properties Properties that describe how a substance changes into a completely different substance (corrosion, oxidation are examples of chemical properties). 2- Physical properties Properties that can be observed without changing the composition of the substance (color, density, m.p., b.p., hardness are examples of physical properties).

9. Physical properties are classified into:

10. Melting point: Point at which the solid becomes liquid. Boiling point: Temperature at which the liquid becomes gas. Density: Weight per unit volume, density = (mass/volume) Solubility: Amount of material that will dissolve in solvent and produce stable solution.

12. soft drink, milk cement, iron filings in sand Example for Homogenous mixture Example for Heterogeneous mixture

13. Quiz time

14. Explain Properties of matter? Homogenous solution? Heterogeneous solution?

15. Student Question

16. Explain Properties of matter? Homogenous solution? Heterogeneous solution? Element? Compound?

17. Meltingpoint? Boiling point? Solubility?

18. Assignments

19. 1-Raymond Chang. Chemistry. 10th ed. 2009 2-Zumdehl. International edition. 2009 Recommended textbooks: