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

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

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 properities of matter 4-Known the classification of matter 5-Differentiate between chemical and physical changes 6-Differentiate between homogenous and heterogeneous mixtures

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.

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

solid liquid gas 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

► Matter can undergo physical or chemical changes: Physical change *Change of 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 hydrogen burns in air to form water e.g2. sugar dissolving in water

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).

Physical properties are classified into:

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.

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

Quiz time

Properties of matter? Homogenous solution? Heterogeneous solution? Explain

Student Question

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

Melting point ? Boiling point? Solubility?

Assignments Group A and Group B Moemen Mohamad El-said Abeer Salah Farida Maher Homogenous mixture in industrial world Mohamad Ramadan - Mohamad Nabil- Mahmoud Hamdi- Abd El Rahman Abd El-Moneim –Yossef Gamal- Mohamad Shabaan- Physical properties in Chemistry Nada Mahmoud – Nadaa Ahmad – Mohamad Mostafa- Fadi Khaled Heterogeneous Mixture in Daily life Ahmad Abd El-Nabi Mohamad Mohamoud- Abd Allah Mohamad- Fatma Ahmad-Fadua Saad Chemical Properties in Chemistry

R ECOMMENDED TEXTBOOKS : 1-Raymond Chang. Chemistry. 10th ed Zumdehl. International edition. 2009