Life science PREPARED BY ; AWALDAD KHAN STUDENT OF POST RM BScN SEMESTER 1 FACULTY: RAMESH KUMAR 16 NOVEMBAR, 2015 NEW LIFE COLLEGE OF NURSING KARACHI

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1 UNIT 06: LIQUID MIXTURES Life science PREPARED BY ; AWALDAD KHAN STUDENT OF POST RM BScN SEMESTER 1 FACULTY: RAMESH KUMAR 16 NOVEMBAR, 2015 NEW LIFE COLLEGE OF NURSING KARACHI

2 OBJECTIVES At the end of the unit learners will be able to: 1. EXPLAIN DIFFERENT TYPES OF LIQUID, MIXTURE,eg TRUE SOLUTION COLLOID AND SUSPENSION. 2. DESCRIBE THE EFFECT OF ISOTONIC,HYPOTONIC,AND HYPERTONIC SOLUTION ON PLANT AND ANIMAL.

3 LIQUID a liquid is one of the states of matter. The particles in a liquid are free to flow, so while a liquid has a definite volume, it does not have a definite shape. OR composed of molecules that move freely among themselves but do nottend to separate like those of gases; neither gaseous nor solid.

4 The liquid are, Not rigid No fixed shape Fixed volume Randomally arranged Move arround each other Close Shape of container Free surface Can not be compressed Diffusion with in a liquid slowely

DIFFERENT TYPES OF LIQUID Liquids are a form of matter that has a definite volume but no defined shape. 1. water 2. milk 1. blood 2. urine 3. gasoline 4. mercury (an element) 5.

5 DIFFERENT TYPES OF LIQUID Liquids are a form of matter that has a definite volume but no defined shape. 1. water 2. milk 1. blood 2. urine 3. gasoline 4. mercury (an element) 5. bromine (an element) 6. wine 7. rubbing alcohol 8. honey 9. coffee liquids may vaporize into gases liquids may freeze into solids A liquid is a state of matter with properties midway between gases and solids. Liquid molecules have less mutual attraction than those of solids and more mutual attraction than those of gases, which is why a liquid is not quite a solid, yet is still firmer than gas. Although they have a definite volume, liquids do not have their own defined shape. The receptacles that contain them determine their shape. Liquids change form when exposed to extreme temperatures. Liquids can boil, evaporate, freeze, condense and form solutions. The particles in water are free to flow, but viscosity may prevent some thick liquids from flowing. A high-viscosity liquid, such as honey, does not flow as quickly as a low-viscosity liquid, such as water. MIXTURE

6 Any substance that has uniform and unchanging composition is considered to be pure. Examples of pure substances include elements. A mixture is a combination of two or more pure substances in which each pure substance retains its individual chemical properties. OR a substance made by mixing other substances together. DIFFERENT TYPES OF MIXTURE Mixtures can either be homogeneous or heterogeneous. A homogeneous mixture is a type of mixture in which the composition is uniform and every part of the solution has the same properties. A heterogeneous mixture is a type of mixture in which the components can be seen, as there are two or more phases present.

TRUE SOLUTION A true solution is a homogeneous solution in which the solute particles have diameters less than 10-7cm. i.e., the solute particles are of molecular dimensions.

For example, sodium chloride in water is a true solution COLLOID Unlike a solution, whose solute and solvent constitute only one phase, a colloid has a dispersed phase

8 TRUE SOLUTION A true solution is a homogeneous solution in which the solute particles have diameters less than 10-7cm. i.e., the solute particles are of molecular dimensions. The particles are invisible even under powerful microscopes. For example, sodium chloride in water is a true solution COLLOID Unlike a solution, whose solute and solvent constitute only one phase, a colloid has a dispersed phase (the suspended particles) and a continuous phase (the medium of suspension). To qualify as a colloid, the mixture must be one that does not settle or would take a very long time to settle appreciably. OR a mixture with properties between those of a solution and fine suspension

The particles in a suspension are larger than those in either a colloid or a solution.

9 SUSPENSION A mixture in which small particles of a substance are dispersed throughout a gas or liquid. If a suspension is left undisturbed, the particles are likely to settle to the bottom. The particles in a suspension are larger than those in either a colloid or a solution. OR a suspension is a heterogeneous mixture containing solid particles that are sufficiently large for sedimentation. Usually they must be larger than one micrometer. [1

21 THANK YOU FOR LISTNING AND WATCHING MY PRESENTATION HAVE YOU ANY QUESTION THEN PLEASE ASK?

Section 1 What Is a Solution? Chapter 13. Mixtures

Section 1 What Is a Solution? Chapter 13. Mixtures Mixtures Mixtures can either be heterogeneous or homogeneous. The particles of a heterogeneous mixture are large enough to see under a microscope. In a homogeneous mixture, however, the particles are molecule-sized,