Chy102-Tutorial 01

Chy102-Tutorial 01 - General Chemistry General Chem102 for...

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General Chemistry Chem102 for Engineering General Chemistry General Chemistry Tutorial 1
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Objectives Define chemistry. Define what is meant by matter. Classification of matter ¾ Elements, compounds, and mixtures How mixtures can be separated? Define a scientific method. Identify different units of measurements. Uncertainty in measurements ¾ Precision and accuracy ¾ Significant figures How to apply dimensional analysis (unit factor method)? What do you mean by intensive and extensive properties? What are the three systems for measuring temperature?
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Classification of Matter Anything that has a mass and occupy a space The properties of compounds are very different from those of the elements they contain. constant composition
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_______ are substances with constant compositions that can be broken down into elements by chemical process. a) Solutions b) Mixtures c) Compounds d) Quarks Which of the following is a chemical property? a) red-brown b) colorless c) burns d) opaque e) solid Which combination will give a heterogeneous mixture? i) water ii) sugar iii) salt a) ii and iii b) i and ii c) i d) i and iii e) i, ii, and iii
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Aid for the classification of matter: Matter Heterogeneous mixture Homogeneous Homogeneous mixture (solution) Pure substance Element Compound Is it uniform throughout ? Can it be separated by physical means ? Can it be decomposed into other substances by chemical processes ? YES NO NO NO YES YES
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Q) Classify each of the following as element, compound or mixture: a) Platinum b) Table salt c) Ethyl alcohol d) Sugar e) Milk f) Silver g) Seawater h) Blood Q) Show how to separate: a) salt from water b) Sand from water c) Sand from sugar Q) Differentiate between compounds and elements giving examples. element element homogenous mixture heterogeneous mixture heterogeneous mixture compound compound compound distillation = evaporation + condensation filtration We can take advantage of the different water solubility. While sugar dissolves in water, sand remains solid. Ethyl alcohol carbon, hydrogen, oxygen
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Q) State the difference between physical and chemical properties A chemical change is accompanied by a change in both properties and composition Rusting of Iron A physical property can be measured and observed without changing the composition or identity of a substance. physical properties include color, temperature, texture, composition, state (solid, liquid, gas), melting point and appearance
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Tutorial 1: 1) Matter 1.8) In the process of attempting to characterize a substance, a chemist makes the following observations: The substance is a silvery white, lustrous metal . It melts at 649°C and boils at 1105°C
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This note was uploaded on 12/13/2010 for the course CHEM 102 taught by Professor Raafat during the Spring '10 term at Ain Shams University.

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Chy102-Tutorial 01 - General Chemistry General Chem102 for...

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