Unit 18 B Study Guide 1. Find the solubility (in mol/L) of lead(II) chloride (PbCl2) at 25oC. Ksp = 1.62e–5. A) 1.59e–2 B) 2.53e–2 C) 6.64e–17 D) 2.01e–3 E) 2.01e–2 2. The two salts AgX and AgY have very similar solubilities in water. It is known that the salt AgX is much more soluble in acid than is AgY. What can be said about the relative strengths of the acids HX and HY? A) Nothing. B) HY is stronger than HX. C) HX is stronger than HY. D) The acids have equal strengths. E)
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The effect temperature has on the activity of the enzyme α- amylase. Introduction Enzymes are a biological catalysts‚ which means that they speed up the chemical reactions in living organisms. Almost all of enzymes are energized protein molecules that catalyse and regulate nearly all biochemical reactions that occur within the human body. The reason in which enzymes are sensitive to heat‚ pH and heavy metal ions is because they are made up of proteins. The food we eat is turned into energy by enzymes
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hindered by deviating the temperature and/or the pH of the buffer solution; hence‚ the color change of the product is less drastic and intense‚ drastic being dark brown‚ somewhat reactive being pink‚ and non-reactive being colorless/clear; thus‚ chemical activity was hindered due to lack of the enzyme¡¦s ability to act at its full potential as a catalyst. Reactions seemingly best occur when all conditions are ¡§neutral¡¨ (i.e. buffer pH =7.0 and temperature around room temperature +-28¢XC)‚ and
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Chemistry 12 Santa Monica College Determination of Kc for a Complex Ion Formation Objectives • • Find the value of the equilibrium constant for formation of FeSCN2+ by using the visible light absorption of the complex ion. Confirm the stoichiometry of the reaction. Background In the study of chemical reactions‚ chemistry students first study reactions that go to completion. Inherent in these familiar problems—such as calculation of theoretical yield‚ limiting reactant‚ and percent yield—is
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Ashley Esparza Stallings Period 2 January 26‚ 2013 Enzyme Catalysis Lab Report Background: Enzymes are catalyst‚ which affect the rate of a chemical reaction. One consequence includes the cell to carry out complex chemical activities at relatively low temperatures. In these reactions the substrate binds reversibly to the active site. The cause of this is a decrease in the energy needed to activate the reaction of the substrate molecule to from products. Every enzyme is particular for a
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(Justification-2 Enzyme Inhibition) By quantitative balance‚ the total amount of Enzyme is [E] 0= [E] + [EI] + [ES] + [ESI]. By using a=1+[I]/KI and a′=1+[I]/K′I‚ it is followed by [E]0=[E]a+[ES]a′ This equation can be written like this‚ [E]0=(Km[ES])/([S]0)a + [ES]a′=[ES]( aKm/[S}0+a’)‚ because of Km=[E][S]/[ES] and [S]≈[S]0. V=kb [ES] =kb [E] 0/ (aKm/[s] 0+a’). Kb [E] 0 is Vmax. This is why V=Vmax/(a^’+aKm/[S]0). This equation can be rearranged like this‚ 1/V= a’/Vmax+(aKm/Vmax)1/[S]0‚ which is
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explore an enzymes activity and how it can be affected by changes to its environment. An enzyme is a protein and is a catalyst to chemical reactions (Raven‚ 2011). It helps accelerate reactions by lowering the activation energy‚ which is needed for reactions in cells to progress at a higher rate (Kaiser‚ 2001). Activation energy is the minimum amount of energy needed for a chemical reaction to occur‚ yielding products from a given set of reactants. Products are results of an enzyme cleaving to a specific
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S. Jusay‚ Oliver Alexander B. Lao and Eunice L. Licudine Group 4 2 E Medical Technology Biochemistry Laboratory ABSTRACT Enzymes are substances that are produced by living organisms and act as catalysts in order to speed up or chance a chemical reaction without changing itself at the end of the reaction. Invertase was extracted first from baker’s yeast. Determination of the effects of changes in pH on enzymatic activity was the main objective of this experiment. Dinitrosalicylic acid (DNS)
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catechol which‚ when exposed to the air‚ becomes oxidized by the oxygen in the air and produces benzoquinone‚ which makes the apple appear brown (Andrew Clapper’s Online Journal‚ 2007). This chemical reaction is catalyzed by the enzyme catechol oxidase (Figure A.1). Enzymes are proteins in cells that speed up chemical reactions (Enzyme Procedure Guide‚ 2013). The catechol oxidase lowers the amount of energy needed in order for the catechol to be oxidized‚ which speeds the process up. Fig. A.1: The
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Enzyme Lab Report Introduction: Enzymes are proteins that enable chemical reactions. In the enzyme lab‚ the effects of concentration‚ temperature and pH on the functionality of the enzyme catalase. The enzyme lab was also about measuring reactions by capturing the oxygen that was generated by the reaction. Materials and Methods: Experiment 1‚ 2‚ & 3 Experiment 1 examined the effects of concentration on catalase activity. Experiment 2 examined the effects of concentration in temperature
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