Chemistry Final Exam Study Guide Shara Shonn Chapter 10 – Temperature – the measure of the average kinetic energy of the molecules or atoms in a system * The higher the kinetic energy the higher the temperature Vaporization – * Vaporization – the process by which a liquid or solid changes to a gas * Occurs when particles have enough energy to escape intermolecular forces Evaporation – * Evaporation – the process by which particles escape from the surface of a non-boiling liquid
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The objective of this lab was to recreate the color profile of a given solution. In this case‚ the solution was Powerade. The final solution should match the absorbance values at the peak wavelengths (420nm and 628nm) in Powerade. This lab was done using deionized water‚ FD&C Blue #1‚ FD&C Yellow #5‚ FD&C Red #40‚ and a spectrometer. To obtain the correct color profile‚ FD&C Blue #1 and FD&C Yellow #5 were utilized in the sample solutions. The experiment was conducted over two days; the first day
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HSB INSTITUTE FOR HIGHER EDUCATION (for IX-XII ‚UG‚PG) ADD: CB 81 D DDA FLATS HARI NAGAR M: 9210846949/9717925135 HSB INSTITUTE FOR HIGHER EDUCATION ADD: CB 81 D DDA FLATS HARI NAGAR An ISO 9001:2008 Certified Institute (Indian Standard Organization(ISO) Certificate Number:2071-QMS-1071) Email id: hsbsolutions7@gmail.com website:www.hsbsolutions.jimdo.com Ph: 9210846949 / 9717925135 Physics: Chapter 2 Solutions Last 15 years questions with solutions Topic: Strength of Solution Q.1Discuss
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be allowed through. In this experiment the percent transmittance increased as time passed by. The percent transmittance was converted to absorbance‚ and it is directly proportional to concentration‚ and our data sets were of absorbance versus time. The abrosbances were treated as if they were actually concentrations of the crystal violet
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stand for 30 minutes. After 30 minutes we removed the bag from beaker and carefully blot excess water to determine final mass. An increase in mass after weighing shows the passing of water inside dialysis tubing from low concentration (beaker w/ only water) to higher concentration (bag w/ sucrose) of solute. Finally‚ to demonstrate a hypotonic solution we used a 3 inch
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Potato Cell Cytoplasm Composition PURPOSE: To determine the concentration of salt in the cytoplasm of potato cells HYPOTHESIS: Increase in salt concentration results in a hypotonic solution where the mass of the potato increases due to the movement of water into the cell. On the other hand‚ decrease in salt concentration results in a hypertonic solution where the mass of the potato decreases due to the movement of water outside the cell. MATERIALS: Potato Forceps Stopwatch Scalpel Test
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11. Account for the fact that ethylene glycol (HOCH2CH2OH) is less viscous than glycerine (HOCH2CHOHCH2OH)‚ but more viscous than ethyl alcohol (CH3CH2OH). 20. Consider the following substances: sodium fl uoride (NaF)‚ chlorine monofl uoride (ClF)‚ hydrogen fl uoride (HF)‚ and fluorine (F2 ). (a) What type of particles does each substance have? (b) What type of intermolecular attractive forces hold the particles together in each substance? The table below lists the melting point (mp)‚
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2.6.6. Levels of total ammonia nitrogen‚ nitrite‚ nitrate and phosphate in the water samples The mean TAN levels in the present study in all the sampling stations were below the recommended level of 0.1 to 1.0 mg/L prescribed by Boyd (1990). However‚ when the level recommended (< 0.2 mg/L) by Chavez (2009) is taken as a standard‚ it was found to that 35% of the study period‚ TAN levels were above the acceptable limit in the feeder canal and the pond 3. Ferreira et al. (2011) has recommended 0
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or vitamins? * How can we make industrial chemicals from oil and natural gas? * What is the concentration of certain contaminants from this factory? * How is a new industrial process likely to affect the environment? * How can we tell what is happening inside a blast furnace‚ or in the exhaust of a jet engine‚ or down a coal mine? * What are the natural concentrations of heavy metals in ground water? * Why Study Chemistry? * Because understanding chemistry helps
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molecules of the involved gases throughout the system (Nave‚ 2008). Diffusion is a net movement of particles from an area of high concentration to low concentration (Traverso‚ 2004). Several factors may affect the rate of diffusion of substances. These factors include the particle size or the molecular weight of the substance‚ the temperature in the system‚ the concentration difference of the substances‚ the diffusion distance‚ the surface area‚ and the permeability of the barrier. The larger the particle
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