Education‚ Inc. Common Ion Effect HA(aq) + H2O(l) ⇔ A−(aq) + H3O+(aq) • Adding a salt containing the anion NaA‚ which • is the conjugate base of the acid (the common ion)‚ shifts the position of equilibrium to the left This causes the pH to be higher than the pH of the acid solution 9lowering the H3O+ ion concentration 2 Dr. Ali Jabalameli Copyright © 2011 Pearson Education‚ Inc. 1 Chemistry102 5/7/2013 Common Ion Effect Copyright © 2011 Pearson Education‚ Inc. 3 The Common-Ion Effect
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reducing numerical evidence available to scientists. However‚ complementary events‚ which have increased in regularity and severity‚ provide indirect evidence‚ which the increasing atmospheric concentrations of oxides of nitrogen and sulfur. These indicators include: · Mt Kilauea‚ Hawaii; released 350 000 tonnes of sulfur dioxide‚ annually since 1986 · Mt Pinatubo‚ Philippines; Spewed out 15-20 million tonnes of sulfur dioxide. · Pea-Soup Fog‚ London; 4000 lives claimed due to fog‚ high in sulfur
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Determination of Equilibrium Constants Introduction Bromothymol blue is an indicator for many acid-base titrations. When adding different solutions within the indicator it is to react and change colors‚ in this experiment the different colors were blue‚ green‚ and yellow. In the following experiment‚ obtaining the absorbance levels for each one makes it possible to calculate the equilibrium constant. Materials and Methods For this specific experiment there are a few materials that are crucial
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to detail‚ and the ability to follow instructions for each soldier‚ and it provides leaders with an indicator of who among their soldiers actually is making an effort and who is just trying to do the minimum necessary to stay out of trouble. How crisp a uniform is pressed‚ how well boots are shined (when we had to shine them‚ the new boots don’t need it) placement of badges are all indicators of the effort someone puts in. Uniformity also helps ensure a comradery‚ and team environment. Everyone
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Research Question How will the addition of different pH buffers to amylase affect the rate of starch digestion measured using starch and iodine? Introduction Amylase is an enzyme found in human saliva and pancreas. It is the digestive enzyme that is needed to breakdown starch molecules. Amylase must be kept at certain conditions to function at its optimum level. This experiment will explore the effect of pH (1‚ 4‚ 7‚ 10‚ and 14) on the function of amylase by using starch and iodine. Usually
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Cell Biology- Osmosis‚ Cell Size and Diffusion and Enzymes 1.0 INTRODUCTION Cells are the basic building blocks of all living things. They provide structure for the body‚ take in nutrients from the food‚ convert those nutrients into energy‚ and carry out specialized functions. Cells also contain the body’s genetic material and can make copies of themselves. A cell is also a metabolic compartment where many different chemical reaction occur. There are two types of cells‚ eukaryotic and prokaryotic
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the above Answer Key: C Part 2 of 3 - 16.0/ 20.0 Points Question 6 of 12 0.0/ 4.0 Points A buffer solution is all of the following EXCEPT: A.a solution that resists a change in pH when a base is added. B.a solution that regulates pH by the addition of a strong acid or base. C.a solution that resists a change in pH when an acid is added. Incorrect D.a solution that contains both a weak acid and its conjugate base. E.All of the above are true. Answer Key: B Question 7 of 12 4.0/ 4.0 Points
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ends up polluting waterways; presenting a hazard to humans‚ fauna and flora. It not only encourages pests to spread germs and diseases‚ but also affects the water quality and the organisms living in them. The pH (potential of Hydrogen) and EC (Electrical Conductivity) can also affect the creek. PH is a measure of the
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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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Data‚ Results‚ Calculations and Discussions Preparation of 250-mL 0.1 M NaOH Solution: Wt. of NaOH= (vol. of Sol’n) (M of Sol’n) (MW of NaOH) = (250 mL) (0.1 M NaoH) (40.0g/mol NaOH) Wt. of NaOH= 1.00 g • One gram of NaOH pellets was weighed and dissolved in distilled water. The solution was diluted to 250 mL. Table 1.Weighing of KHP (weighing by difference) |Replicate |Wt. of container -sample‚ g |Wt. of KHP
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