PPT-Water and Weak Bonds

Stryer Short Course Chapter 2 Water Polarity Medium for Brownian motion Solvent Intermolecular Forces Electrostatic Ionic Permanent dipole Hbonding Van der Walls Not true categories. Pratt & . Cornely. Chapter . 2. Water. Electrostatic forces. ~2.3 H-bonds/ water molecule. Liquid vs. solid water. Intermolecular Forces. Relative strength of IMF. Permanent dipole. London dispersion forces. Unit 1 – Chemical Changes and Structure. Bonding and Structure. The Formation of Bonds. Bonds. are . electrostatic forces. (attractions between positive and negative charges) which hold atoms together.. Spring 2011. Chapter 2: Basic Chemistry. Chemistry Review. MATTER – anything that takes up space & has mass. ELEMENTS – basic substances making up all matter that cannot be broken down into smaller substances with different properties; there are 92 naturally occurring. Stryer. Short Course. Chapter 2. Water. Polarity. Medium for Brownian motion. Solvent. Intermolecular Forces. Electrostatic: Ionic. Permanent dipole. H-bonding. Van der Walls. Not true categories…. “the liquid of life”. Water water everywhere and not a drop to drink. Don’t go chasing waterfalls. Like a bridge over troubled water. Rain drops keep falling on my head. The fog creeps in on little cats feet. Why Water is Special. Why do we study water properties in biology class?. About 2/3 of the mass of a cell is water!. Most life-sustaining reactions occur in water solutions. Polarity. Polarity describes the distribution of electrons in a molecule. Understand . factors that influence the choice of solvents, including:. i. ) . water, to dissolve some ionic compounds, in terms of the hydration of the ions. ii) . water, to dissolve simple alcohols, in terms of hydrogen bonding. a new . pathway that cleaves . the . C-O bonds . in aromatic ethers using . Pd catalysts, . breaking these bonds . under mild conditions. . Significance and Impact. . New pathway for converting lignocellulose into fuels. Atoms are composed of protons, neutrons and electrons. These subatomic particles are charged….. Atoms make elements… Elements can’t be broken down into anything simpler. . Examples:. Carbon= C. intracellular reactions occur in an aqueous environment.. Water (H. 2. O) is a chemical compound consisting of two. hydrogen atoms and one oxygen. . . Electrolyte Chemistry – Water properties. -0.45V. Water molecules are polar…, and polarizable. The H. 2. O electrons shift from the O-H bond towards the O-” Field”. . . 0.9V. . . . Water properties, concentration. , and . speciation. Measured water properties for Process Engineering. Properties affected by dissolved species (pure water value in parenthesis). pH (7.0). Electrical Conductivity (6x10. A Presentation to Accompany the Case Study: NATIONAL CENTER FOR CASE STUDY TEACHING IN SCIENCE Do Grasshoppers Sweat? by John G. Cogan, Emily Hill, and Henry D. Prange The Molecule of Life Water is the biological medium of life on 1. Matter/ Elements/ Compounds. Matter. . . anything that takes up space and has mass. Element. . . a substance that cannot be broken down (periodic table). Compound. . . 2 or more different elements (Ex. H.