Baron Hasslinger Chemistry Like Dissolves Like — a Demonstration of Polarity Aim: To illustrate that polar solutes dissolve in polar solvents and that non-polar solutes dissolve in non-polar solvents by mixing polar and non-polar solutions in test tubes. Material: • Lab coats and safety spectacles • A fume cupboard • Heptane • Water • Potassium Permanganate • Iodine • 2 test tubes • 4 small flasks Method: (Wear safety specs and lab coats) • Prepare 4 small flasks containing: • A Heptane • B
Premium Chemical polarity Solubility Solvent
CHEMICAL BONDS Chemical Bonds I. Introduction Chemical compounds are formed by the joining of two or more atoms. A stable compound occurs when the total energy of the combination has lower energy than the separated atoms. The bound state implies a net attractive force between the atoms called a chemical bond. The two extreme cases of chemical bonds are the covalent bonds and ionic bonds. Covalent bonds are bonds in which one or more pairs of electrons are shared by two atoms. Covalent bonds
Free Ionic bond Chemical bond Covalent bond
free radical. Lone pairs tend to occupy a lot of space and lower the angle of a bond‚ which gives molecular geometry. Lewis structure help determine the molecular geometries‚ 3D structure‚ and distribution of electrons in order to understand the chemical properties of reactivity and molecules like texture and microstructure. One of the most important influences
Premium VSEPR theory VSEPR theory Molecular geometry
Molecule Polarity PhET Lab A study of electronegativity‚ bond polarity‚ and molecular polarity Introduction: In this atomic-level simulation‚ you will investigate how atoms’ electronegativity value affects the bonds they produce. When two atoms bond‚ a pair of electrons is shared between atoms. Electronegativity is a measure of a single atom’s ability to hoard electrons shared in that bond. In this lab you will work diligently‚ at your own pace‚ to answer a number of questions. To begin‚ from
Premium Atom Chemical polarity Chemical bond
Alexis Jones 4/20/16 Chemistry- Water Polarity Mrs. Jenny Polarity: The intermolecular forces between the slightly positively- charged end of one molecule to the negative end of another of the same molecule. Polarity simply means that the molecule has both a negatively and positively charged end. The polarity of water is important because it is responsible for dissolving other polar molecules like ionic compounds (such as salt) and sugars. To form ions‚ ionic compounds must be dissolved in water
Premium Atom Oxygen Water
mix well with water because they are hydrophobic and when poured in water they will not dissolve. Non polar compounds may stay on top of water without any movement and examples of this would be oil and fats. Part 1: Making Slime 2. What kind of chemical bond formed between borate and the guar gum? I would say a Covalent Bond because it deals with the polar and non-polar substances. 3. Describe the physical characteristics of the slime using one to two complete sentences. The slime was yellowish
Premium Chemical polarity
Liquid Chromatography Purpose: The purpose of this lab was to separate substances based on their polarity by using liquid chromatography. Data Table: Red Dye Blue Dye Run#1 Run#2 Run#3 Run#1 Run#2 Run#3 Start of Band(mL) 1.50 2.20 1.00 2.70 3.00 2.00 End of Band(mL) 2.70 3.00 2.00 6.40 5.50 6.00 Beaker Eluant Observations 1 H2O White powder 2 5%isopropyl Red powder 3 28%isopropyl Blue powder 4 70%isopropyl Oily residual Calculations: W = Vend – Vstart
Premium Chemical polarity Atom Oxygen
Part A 1) Results in table form Solvent: Solvent: Solvent: methanol Solid Organic Molecules water hexane (intermediate (highly polar) (nonpolar) polarity) Benzophenone Soluble after O Partially Completely 20 seconds soluble after soluble after without C 60 seconds 20 seconds mixing Succinic Acid Insoluble
Premium Solvent Ethanol Chemical polarity
Chapter 1: Intermolecular Forces: Liquids‚ Solids‚ and Phase Changes Chem 11: General Chemistry 2 Topics 1.1 An Overview of Physical States and Phase Changes 1.2 Quantitative Aspects of Phase Changes 1.3 Types of Intermolecular Forces 1.4 Properties of the Liquid State 1.5 Uniqueness of Water 1.6 The Solid State: Structure‚ Properties and Bonding A hot spring on a snowy day The Kinetic Molecular View of the Three States The characteristic properties of gases‚ liquids
Premium Water Atom Fundamental physics concepts
Experiment 2: Extraction – Evaluation Summary Labs reports must be typed and chemical structures must be drawn with ChemDraw. Report must not exceed three pages (including this page). Page limit does not include any attached spectra or references. ** Deductions for hand written report/structures and exceeding page limit ** Report Breakdown Data/Results: _________________ /10 Discussion: _________________ /10 Report Total: _________________ /20 Other Lab Marks
Premium Solubility Fatty acid Solvent