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Chemistry

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Prelab

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Chemical kinetics
Order of reaction

Prelab 12: Rate Properties of an Iodide Solution Chemical Kinetics ? The study of rates of chemical processes Rate of a Chemical Reaction ? Measure of how the concentration or pressure of the involved substances changes with time Overall Reaction Order ? If more than one reactant is present in the reaction, the sum of the exponents is the overall reaction order. Rate Constant ? The coefficient that precedes the concentrations in a simple reaction Activation Energy ? Energy that must be overcome before a chemical reaction can occur Stoichiometric coefficient ? The degree at which a chemical species participates in the reaction PRELAB QUESTIONS:

Chemistry Section 5.2 Notes

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Section 5.2: Electron Configuration and the Periodic Table Periods and Blocks of the Periodic Table: Elements arranged vertically in groups/family with similar properties Elements in horizontal rows (period) w/ similar chemical properties Length of period = number of electrons occupying sublevels being filled in that period Periodic Table divided into 4 blocks: s,p,d,f Name of each block determined by whether an s,p,d, or f sublevel is being filled in successive elements of that block Period of element determined from element?s electron configuration Aresnic: [Ar]3d104s24p3 4 in 4p3 indicates arsenic?s highest occupied energy level is 4 The s-Block Elements: Groups 1 and 2: Elements of s block are chemically reactive metals (Grp1 more reactive)

Chemistry Section 5.2 Notes

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chemistry 5.2 notes

Section 5.2: Electron Configuration and the Periodic Table Periods and Blocks of the Periodic Table: Elements arranged vertically in groups/family with similar properties Elements in horizontal rows (period) w/ similar chemical properties Length of period = number of electrons occupying sublevels being filled in that period Periodic Table divided into 4 blocks: s,p,d,f Name of each block determined by whether an s,p,d, or f sublevel is being filled in successive elements of that block Period of element determined from element?s electron configuration Aresnic: [Ar]3d104s24p3 4 in 4p3 indicates arsenic?s highest occupied energy level is 4 The s-Block Elements: Groups 1 and 2: Elements of s block are chemically reactive metals (Grp1 more reactive)

Graphene Writeup

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graphene

Tucker Oppenheim April 29, 2011 Gray C block Friday reading Graphene The material graphene can be described as a tiny layer composed of graphite. In the article it goes over the possibility of graphene being used as a new and up and coming material. The reason they think this is because it is the thinnest material able to be made. Some uses they believe might be useful are the use of graphene in the making of batteries. The goal would be to minimize the space required for battery operation. In addition to it's thin demeanor, they say its trait's will change future technology greatly. It is said to be 200 times stronger than steel. In addition to its strength it is also the best electricity conductor.

Solubility Lab

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solubility

Name________________________Name________________________Name________________________Name________________________________________________________________________________________________________________ A SolutionSolutionSolutionSolution is a type of homogeneous mixture formed when one substance dissolves in another. The particles of the mixing substances are evenly spread throughout. The substance that is dissolved is called the solutesolutesolutesolute. The substance that does the dissolving is called the solventsolventsolventsolvent. If a substance is soluble in water, it means the substance can dissolve in water. The amount of solute that will dissolve in 100 grams of water is called the solubilitysolubilitysolubilitysolubility. Solubility is effected by

Thermodynamics Lab Report

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Emily Dinnerman?s Sean Mannix Mr. Tenenbaum Period 5 3/8/11 Thermodynamics?Chill Out Lab Report Purpose: To measure and record changes in the heat (enthalpy) content of a liquid (water) as a part of the system (ice cube) melts in that system (the water plus the ice cube). Materials: Ice cubes (1) Styrofoam cups (2) Thermometer [Access to] hot water Procedure: Measure out 50 mL (roughly?just record exactly how much) of hot water from the sink and pour into the Styrofoam cup. Measure the temperature and record the value. Add an ice cube and monitor the temperature in the mixture until the ice cube is completely melted. Record the temperature. Measure the final volume of the water left and record the value. Data: Unit Measurement Change in volume Change in temperature

Chem notes

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1/12/11 Lo: SWBAT draw Lewis Dot Structures for molecules which have resonance structures. Lab: Is It a Single or Double Bond?Or Both H, Be, B, N can all end up with less than an octet. B and Be are electropositive compared to nonmetals. They do not make double or triple bonds. They do not have the ability to take electrons from more electronegative nonmetals. N can end up with an odd number of electrons. I WRONG: each orbital can only hold 2 electrons. This represents 3 electrons per orbital. CO3 -2 Three possible Lewis Dot structures for carbonate, depending on where the double bond is. ( on the test either of the three will be correct). These represent the three resonance structures

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