Crystallization and Melting Points Organic Chemistry 221 9/19/2012 Intro/Purpose: The purpose of this lab was to use crystallization to separate a compound from a solvent and be able to choose the best solvent to do so. Then identify an unknown and verify purity using melting points. Solubility contributes to crystallization; because a solute has lower solubility at lower temperatures‚ which makes the solvent separate from the solution as a solid. This process is important to understand because
Premium Solubility Chemical polarity
Demerit point system Demerit points are added to your driver’s licence‚ if you are convicted of breaking certain driving laws. The rules are different depending on if you are a new driver or have a full licence. You don’t lose demerit points on your driving record. You start with zero points and gain points for being convicted of breaking certain traffic laws. They stay on your driving record for 2 years from the date you received the offence. For G1 and G2 level drivers‚ the licence is suspended
Premium Driving Traffic law Driver's license
The Lagrange point phenomenon exists in any system wherein the gravitational fields of two large bodies interact to create five “sweet spots”‚ within which lies the exact centripetal force necessary for a smaller object to remain in a constant orbit with the larger objects. There are five Lagrange points within the Sun-Earth orbit‚ as well as five Lagrange points within the Earth-Moon orbit. These points will vary according to the mass of the two larger objects‚ as well as the distance between
Premium Sun Gravitation Solar System
urban design standard‚ BKC has seven‚ all of them with either gold or platinum ratings‚ which means these buildings score highly in energy efficiency‚ water efficiency and have better indoor environmental quality. The final reason is that Nariman Point remains relatively expensive. What makes the BKC special among the consulates are its excellent infrastructure facilities and well-regulated traffic around the area‚ which makes travel less cumbersome. Located strategically closer to international
Premium Mumbai
tunnel. Throughout the story‚ the author uses the third person omniscient point of view to describe the boy ’s surroundings and to show us both what he and the other characters are thinking and what is happening around them. By using this point of view‚ the author is able to describe the setting of the story‚ give a detailed description of the characters‚ and make the theme visible. By using the third person omniscient point of view‚ the narrator can give us a detailed and unbiased description of
Premium Fiction Short story Narrative
Organic Chemistry: CHP 225 Thomas Hsieh Experiment 2: Boiling Points o Date experiment was performed: September 16‚ 2011 o Objective: To determine the boiling point of organic compounds such as tert-butyl alcohol‚ sec-butyl alcohol‚ n-butyl alcohol‚ and an unknown. o Principle: Boiling point is the temperature at which gas and liquid phases coexist in equilibrium. At this temperature‚ the vaporization rate and the condensation rate are equal. The liquid and vapor reach a state of dynamic
Premium Gas Temperature Water
ways to accomplish tedious task. The company needs an effective and accurate computerized point of sale system that will enable them to assure their revenue and will provide accurate and detailed sales reports. A Point of sale (POS) system is where a retail transaction is completed. It is the point at which a customer makes a payment to a cashier in exchange for goods or services. The project ‘Computerized Point of Sale System’ will enable the company to have the control over their transactions‚ and
Free Point of sale Sales Receipt
for Review of Journal Article Student(s) Name : Title of Article : Date of submission : MY REVIEW Introduction Give an overview of the article. Development What are the key points in this article? What did I find striking or interesting about these key points? How relevant are the key points to my role as a teacher? What do I agree or disagree with in this article? How has this article influenced me in thinking deeply about my values‚ beliefs and assumptions? How specifically
Premium Reflection Knowledge management Teacher
Lab #1: Melting Points of Organic Compounds Report Form May 15‚ 2014 1. A “Melting Point Range” refers to the range of temperature at which a solid melts into its liquid state. 2. Pure compounds have narrow or ‘sharp’ melting point ranges‚ 1°C or less if the compound is very pure. A less pure compound exhibits a broader melting point range‚ between 3°C to 10°C as well as a depressed or lower range. 3. Crushing the sample allows for greater surface area-to-volume ratio of the powder‚ this
Premium Temperature Thermodynamics Heat
Purpose The purpose of this lab is to find the boiling point of the liquid and find the melting point of the solid. Procedure Boiling point: To find the boiling point of Isopropyl Alcohol I put about 1 mL of it in the test tube. Then I attached the thermometer to the test tube with a rubber band(make sure the thermometer bulb is lined up with the end of the test tube). After that I made a water bath with a beaker and put in the test tube with the thermometer. I then used a burner and a burner stand
Premium Chemistry Water Ethanol