BCMB 311‚ Advanced Cell Biology‚ Fall 2012 EXAM 1 __________________________________Name True-False Questions (Write T or F next to the question‚ 1 point each) 1. A globular protein in the cytoplasm will normally be folded up in such a way that most of its non-polar sidechains are buried in the interior of the protein and most of its polar and charged side-chains are exposed on its surface. T 2. Alpha helices are stabilized by hydrogen bonds between amino acid side chains‚ whereas beta
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Ashley Huston ILab‚ Week #2 CATIONS AND ANION LAB Introduction The purpose of this lab is to demonstrate a double-replacement reaction of ionic compounds. In this experiment‚ you will combine two ionic compounds. Both compounds are soluble in water. If a response happens between these two compounds‚ then a precipitate will form because one of the two resultant compounds is not soluble in water. This is a hint that a reaction took place. Cations are positively charged ions that are attracted
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Jeanine Azzo Chemistry 1412 Professor Chaka April 15‚ 2014 Group 10-9 Solubility‚ Kidney Stones‚ CSI Pre-Lab Objective To conduct an experiments to determine solubility of ionic compounds in different solute-solute and solvent solute interactions. Description We will be mixing ionic compounds in solute-solute and solvent solute interactions. We will be combining sodium‚ potassium‚ calcium‚ magnesium‚ copper‚ iron‚ nickel and silver and some anions like chloride‚ sulfate‚ nitrate
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occurring‚ solid‚ crystalline‚ inorganic substance‚ that has a specific chemical composition. 6. What is a compound? New substance that results from the bonding of two or more elements. 7. What is the difference between covalent and ionic bonds? Ionic Bonds are the bonding of two electrically charged atoms when one atom has transferred an electron to the other causing the two ions to become positively and negatively charged. Covalent
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agent or as a reducing agent in each of the following redox reactions. a) SO2 + Mg 2MgO + S b) 3SO2 + Cr2O72− + 2H+ 3SO42− + 2Cr3+ + H2O c) SO2 + 2NO3− SO42− + 2NO2 d) SO2 + 2H2S 3S + 2H2O 5. Write the balanced ionic half-equation to show: a) the oxidation of iodine (I2)‚ in acid medium‚ to give iodate ion (IO3−) b) the reduction of vanadyl ion (VO2+) to give vanadium (III) ion‚ in acid medium. c) the reduction of manganese dioxide‚ in acid solution‚ to give
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balanced equation of: 3 Fe(NO3)2 (aq) + K3Fe(CN)6 (aq) ↔ 3 Fe(CN)2 + K3Fe(NO3)6 It has a net ionic equation of: Fe2+(aq) + K3Fe(CN)6(aq) ↔ KFe(III)Fe(II)(CN)6(s) + 2K+(aq) To determine the presence of Fe3+‚ 0.10 M of KSCN was used. The product was a blood red solution. The reaction’s balanced equation is: Fe(NO3)2 (aq) + 2 KSCN (aq) Fe(SCN)2 (aq) + 2 KNO3 (aq) It has a net ionic equation of: Fe3+(aq) + SCN-(aq) → FeSCN2+(aq)
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are known as polymorphic forms or polymorphs. For example: graphite and diamond. 2. Get the Power of Visual Impact on your side Log on to www.topperlearning.com 2 6. Type of Solid Molecular solids 1. Non polar 2. Polar 3. Hydrogen bonded Ionic solids Ions Dipole-dipole interactions Hydrogen bonding Coulombic or electrostatic HCl‚ solid SO2‚ solid NH3 H2O (ice) Soft Hard Insulator Insulator Low Low Types of crystalline solids: Constituen t Particles Molecules Bonding/ Attractive Forces
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CHEM 208 Module 2: List the steps of the scientific method: Scientific Method: performing a study in organized step: (led to enunciation of Law of Conversation of Mass and Matter) 1. Performing experiments: a. An experiment is a set of steps (procedures) that are performed under controlled
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Title: Study of Solubility Equilibrium Abstract The effect of temperature on the solubility product constant‚ Ksp‚ of potassium hydrogen tartrate in water was investigated in the temperature range of 285K to 318K at normal atmospheric pressure. It was found that the solubility of potassium hydrogen tartrate decreases with a decrease in temperature and consequently a smaller volume of sodium hydroxide is needed to neutralize it. The molar solubility of potassium hydrogen tartrate was calculated
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neutralization reactions. 8. Write net ionic equations for neutralization reactions. PROCEDURE Please complete the entire experiment as instructed in the lab manual except for any modifications noted below. Fill out the report below and submit it me electronically via Canvas. Email the digital photographs to me at acarrawa@meridiancc.edu . NOTE: Before answering the questions‚ you may want to review the tutorials on balancing chemical equations and writing net ionic equations that are in the Canvas
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