PH 104 Astronomy Homework 3 Solutions Spring 2011 This assignment covers Chapter 2 1. Explore atomic structure Place correct words on the cartoon of an atom. The central particle with neutral (no) charge is identified. Answer below. 1. The number of protons identifies the type of element. 2. The number of electrons identifies whether an atom carries charge as an ion or is neutral.
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You need to prepare an acetate buffer of pH 6.24 from a 0.818 M acetic acid solution and a 2.79 M KOH solution. If you have 925 mL of the acetic acid solution, how many milliliters of the KOH solution do you need to add to make a buffer of pH 6.24? The pKa of acetic acid is 4.76.
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It runs from 0 to 14, with a pH of 7 being neutral, a pH lower than 7 being acidic and a pH higher than 7 being alkaline. The scale is logarithmic, meaning each whole pH value below 7 is ten times more acidic than the next higher value. For example, pH 3 is ten times more acidic than pH 4 and 100 times more acidic than pH 5.
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Arrange the following 0.100 mol L-1 solutions in order of increasing pH: CH3COOH, NaCl, NaCH3Coo. asked by Litia on October 28, 2015; chemistry. Arrange the following aqueous solutions in order of increasing freezing points (lowest to highest temperature): 0.10 m glucose, 0.10 m BaCl2, 0.20 m NaCl, and 0.20 m Na2SO4.
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Answer and Explanation: Since the molar concentration of the buffer components are equal to one another, the pH is equal to its pKa. The necessary pKa for acetic acid is 4.74.
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