ACID/BASE You might need to know the following K values: CH3COOH Ka = 1.8 x 10–5 Benzoic Acid Ka = 6.5 x 10–5 HNO2 Ka = 4.5 x 10–4 NH3 Kb = 1.8 x 10–5 HF Ka = 7.2 x 10–4 H2S Ka = 5.7 x 10–8 HSO4– Ka = 1.2 x 10–2 HS– Ka = 1.2 x 10–13 HCOOH Ka = 1.8 x 10–4 HOCl Ka = 3.0 x 10–8 SIMPLE ACIDS AND BASES 1. According to the Brønsted–Lowry definition‚ which species can function both as an acid and as a base? (A) Cl– (B) SO42– (C) NH4+ (D) HCO3– (E) H3O+ 2. Which of the following
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The purpose of this experiment is to separate a solution of an acidic and organic compound and purify its respective acidic product through the techniques of an acid base extraction‚ recrystallization‚ and use of Melt Temp (melting point range). The reaction of an unknown acid (3-chlorobenzoic acid) with diethyl and sodium hydroxide was observed‚ and the solution naturally separated into an aqueous and organic solution. The mixture of acid and organic solution was created and then separated through
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18.1.4 – 18.1.6 CALCULATIONS INVOLVING ACIDS AND BASES Review of Important formulas pH = ‐ log10[H+] [H+] = 10‐pH pKa = ‐ log10 Ka Ka = 10‐pKa pOH = ‐ log10[OH‐] [OH‐] = 10‐pOH pKb = ‐ log10 Kb Kb = 10‐pKb The ionic product of water = Kw = [H+] x [OH‐] = 1.0 x 10‐14 mol2 dm‐6 at 298 K The expression varies with temperature
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Experiment #7: Acids‚ Bases and Salts Mabag‚ Viannery D.‚ Mangune‚ Paolo D. Chem 14.1‚ MAB1‚ Ms. Angelyn del Rosario March 8‚ 2010 I. Abstract The experiment allowed students to explore different electrolytes and classify them into acids‚ bases and salts by using different indicators or by measuring the pH levels of each. The experiment also helped students classify different substances through their conductivity properties. The preparation of a 1 M stock solution from NaOH pellets diluted to a
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Communication and Bases of Power Student Name BCOM/230 Date: September 9‚ 2013 Instructor Name Communication and Bases of Power Power influences our behavior and the way we communicate in the workplace. Power is defined as the affected behavior of one person from the influence of another person with higher authority. Depending on how the power is used‚ it may have a positive or negative effect in an organization. According to Robbins and Judge (2009)‚ there
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Product cost is the cost of direct labor‚ direct materials‚ and manufacturing overhead that are consumed to create a product. Product cost can also be considered the cost of the labor required to deliver a service to a customer. Direct Material Cost Definition: Direct material cost is the cost of materials used to manufacture a product or provide a service. Direct Labor Definition: Direct labor is production or services labor that is assigned to a specific product‚ cost center‚ or work order
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Cost reduction Generally defined as the act of cutting costs to improve profitability. Cost reduction‚ should therefore‚ not be confused with cost saving and cost control. Cost saving could be a temporary affair and may be at the cost of quality. Cost reduction implies the retention of essential characteristics and quality of the product and thus it must be confined to permanent and genuine savings in the costs of manufacture‚ administration‚ distribution and selling‚ brought about by elimination
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Acids and Bases Q1.This question is about several Brønsted–Lowry acids and bases. (a) Define the term Brønsted–Lowry acid. ........................................................................................................................ ........................................................................................................................ (1) (b) Three equilibria are shown below. For each reaction‚ indicate whether the substance immediately above the box is acting
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CHAPTER 3 COST-VOLUME-PROFIT ANALYSIS TRUE/FALSE 1. To perform cost-volume-profit analysis‚ a company must be able to separate costs into fixed and variable components. Answer: True Difficulty: 1 Objective: 1 Terms to Learn: cost-volume-profit (CVP) analysis 2. Cost-volume-profit analysis may be used for multi-product analysis when the proportion of different products remains constant. Answer: True Difficulty: 1 Objective: 1 Terms to Learn: cost-volume-profit
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quantity. Counting plays a role in constructing base-ten ideas about quantity. Each approach helps children think about the quantities in a different way. Counting by one‚ is a primary way they can name
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