Chem 212 week one, chapter one notes and take home questions
Chem 212 week one, chapter one notes and take home questions Chem 212
University of Louisiana at Lafayette
Popular in Survey of Chemistry for Education Majors
Popular in Chemistry
This 7 page Class Notes was uploaded by Kaylee Friou on Monday September 12, 2016. The Class Notes belongs to Chem 212 at University of Louisiana at Lafayette taught by Jennifer De Guzman in Fall 2016. Since its upload, it has received 7 views. For similar materials see Survey of Chemistry for Education Majors in Chemistry at University of Louisiana at Lafayette.
Reviews for Chem 212 week one, chapter one notes and take home questions
Report this Material
What is Karma?
Karma is the currency of StudySoup.
Date Created: 09/12/16
Chapter 1: Properties of Matter 1.1 What is Chemistry? • Chemistry: The study of the composition, structure, and properties of matter. • Matter: Something which has mass and takes up space. Things which ARE Matter: Things which AR NOT Matter: 1) Desk 1l ove 2) book w2)ds 3) air tho3)hts 1.2 Classifying Matter A. Pure Substance • Pure substances are those pieces of matter which Fixed composition and cannot be separated________ by any physical process. 1._Elements_ are pure substances made up of only __one type of atom (hydrogen, Gold)_ 2._Compounds_ are pure substances made up of only _____one type of molecule_______ formed when atoms are held together by chemical bonds (_____CO2, H2O______) • To be classified as a pure substance, elements or compounds must be in _one or 3 states of matter (solid, liquid, gas)______. 1 B. Mixture • A mixture is a physical combination of two or more pure substances___________ • Mixtures can have any combination of states ____________ (solids, liquids, gases, all together). • A mixture can be separated by a physical process • Mixtures can be split up into two main types: 1. __Homogeneous__ mixtures have a uniform makeup and appearance. The individual components are ___impossible to detect______ in the mixture. Ex: saline solution, coffee, air 2. ___Heterogeneous____ mixtures have a varied appearance. The individual components are ____much easier to detect______ within the mixture. Ex: chocolate chip cookies, iced tea, soil A. Physical Properties: those characteristics of an object which can be _observed____ with out changing the identity___ of the object. 1) Observed by the Senses Size Shape Color Odor Texture Luster Relative weight Relative temperature 2 2) Observed with Instruments Weight Length Height Width Temperature Volume B. Physical Changes: changes made to a physical property only 1) Change of __shape, size, texture, color___: Breaking glass Sanding rough wood Paint colors blending 2) Change of __state (solid, liquid, gas)__ or _disolving__: Alcohol evavporating Ice melting Salt dissolving in water C. Chemical Properties: the _potential__ of an object to underdo a chemical reaction which would _change_ _the identity_ of the object. Flammability Hydrogen gas and oxygen burn in air to form water Sodium will react explosively when placed in water D. Chemical Changes: an actual chemical reaction is taking place A match burning Digestion process Baking soda and vinegar violently reacting to form lots of bubbles 3 1.3 Observation Vs. Inference A.Observation: reporting only the facts_ of an experiment of event. B.Inference: __interpretation_ of the observations made in an experiment and the formation of _conclusions (crime scene)_. Observations from the picture shown: 1) dress is white 2) sand 3) kissing Inferences made from the picture shown: 1) married 2) models 4 Chapter 1 Take Home Problems: 1) Which of the following can be classified as matter? a) dog f) dirt b) fear g) bacteria c) hate h) air d) water i) light e) light 5 2) Classify the following as a pure substance, homogeneous mixture, or heterogeneous mixture a) vegetable soup b) silver c) hot tea d) ice water e) ham sandwich f) helium g) air (usually) h) Carbon Dioxide (CO )2 i) methane (CH ) 4 j) sea water 3) Identify the following as elements or compounds. a) Si b) NH 3 c) SiH4 d) K e) Co f) CO g) As h) CBr 3 4) Classify the following as either chemical or physical Properties: a) Zinc is a gray solid b) Hydrogen will react explosively with Oxygen c) A sample of ice is at a temperature of 0 Co d) Notebook paper is a rectangle e) Notebook paper is flammable f) Iron will form rust by reacting with Oxygen g) Fluorine has a pale yellow color h) A sample of gold weighs 34 grams. i) Food will rot if left out for too long 5) Classify the following as either chemical or physical changes: a) Aluminum is hammered into a thin sheet b) Water vapor condenses into liquid water on a glass of iced tea c) A sandwich is eaten by a student and metabolized d) Purple and Blue paint are combined to make Indigo Paint e) A house has caught on fire and is burning f) Solid Iron melts into liquid iron if heated g) A car gets a dent on its bumper in an accident h) I dissolve sugar in my morning coffee i) A silver spoon tarnishes with exposure to air 6) Read the story below, and classify the statements as observations or inferences: A young man is sitting in a coffee shop. He is drinking a latte and crying openly. At 2:30 PM his phone rings. He answers the phone, talks for a few minutes, and then shouts “Fine!” into the phone and hangs up. a) A young man is sitting in a coffee shop b) His girlfriend has just broken up with him c) The young man is sad d) The young man is crying openly e) The young man has an eye infection f) At 2:30 PM his phone rings g) The man shouts “Fine!” into the phone h) He only ever drinks lattes i) The man is angry at the person who called