Chapter 13 Acids and Bases (Dr Chong Fai Kait) 1) A 7.0 103 M aqueous solution of Ca(OH) 2 at 25.0 °C has a pH of __________. A) 12.15 B) 1.85 C) 1.4 102 D) 7.1 1013 E) 11.85 Answer: A 2) The acid-dissociation constant at 25.0 °C for hypochlorous acid (HClO) is 3.0 108 . At equilibrium‚ the molarity of H 3 O in a 0.010 M solution of HClO is __________. A) 1.7 105 B) 0.010 C) 5.8 1010 D) 4.76 E) 2.00 3) Using the data in the table‚ which of the conjugate acids below is the weakest
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The five bases of power are divided into two groups; formal power and personal power‚ and further subdivided into five specific categories under each group. Categories of formal power are coercive power‚ reward power‚ and legitimate power‚ and they come from the authority of one person over another. Categories of personal power are expert power and referent power‚ and they come from one’s characteristics rather than one’s authority. “Coercive power base depends on fear of the negative results from
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more alluring than the prospect of conquering a mountain. At 1:15 a.m. I emerged from my tent with my boots laced‚ my ice-axe stowed‚ and my headlamp glowing. I was ready for this mountain‚ rearing to begin the ascent up its face. Before leaving base camp‚ my guide had a few words to share with the team. We gathered around him‚ and he began. “This will not be an easy climb‚” he warned‚ “And not all of you will reach the summit. If you feel disoriented‚ I will send you down. If you are slowing‚
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Bases are substances that are in aqueous solution‚ are slippery to the touch‚ taste bitter‚ change the color of indicators Examples turn red litmus paper blue and react with acids to form salts‚ promote certain chemical reactions. General properties of a base are Concentrated or strong bases and are caustic on organic matter and react violently with acidic substances. Also bases can are bitter in taste. And the pH of a basic solution at standard conditions is greater than seven. Strong bases are
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Down a half.. thirty seconds! Forward drift? Yes! Okay! Contact light. Ok engine stop! ACA—out of DETENT. Out of DETENT. MODE CONTROL—both AUTO. DESCENT ENGINE COMMAND OVERRIDE—OFF. ENGINE ARM—OFF. We copy you down‚ Eagle. Houston‚ Tranquility Base here…… The Eagle has landed. Roger‚ Tranquility. We copy you on the ground. You got a bunch of guys about to turn blue. We’re breathing again. Thanks a lot.” And cut! Take five guys. So‚ did the moon landings take place? Of course they did
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Acid-Base Titration Objectives: 1. To titrate a hydrochloric acid solution of unknown concentration with standardized 0.10M sodium hydroxide. 2. To utilize the titration data to calculate the molarity of the hydrochloric acid. Materials: See handout for more info. Procedure: See handout for more info. Data and Calculations: Table 1: Volume of NaOH Required to Neutralize 10.00mL of Unknown HCl Molarity of NaOh | Trial 1 | Trial 2 | Trial 3 | Trial 4 | Initial Volume of NaOH(mL)
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The virtual manipulative that I ended up exploring was base blocks. The main goal of this virtual manipulative was to show students a number and have them express it through the base blocks. This manipulative ending up working better in some regards when compared to a concrete manipulative. One reason that it worked better is that it automatically checks your answer once the student has made it to the number presented‚ which cannot be done by concrete manipulatives. Another reason that it works better
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Period: 4 Strong Acid and Weak Base Lab PURPOSE: To find the molarity of an unknown acidic acid. MATERIALS: 1. 250 mL beaker 2. 10 mL graduated cylinder 3. 50 mL beaker 4. Funnel 5. 125 mL Erlenmeyer flask 6. 50 mL buret 7. Ring stand 8. Strong acid 9. Weak base 10. Phenolphthalein 11. De-ionized water. PROCEDURES: 1. Fill the buret with a weak base and place it in the ring stand. 2. Fill the 50 mL beaker with
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ACIDS & BASES Acids/Bases Basics Acids and bases are common solutions that exist everywhere. Almost every liquid that we encounter in our daily lives consists of acidic and basic properties‚ with the exception of water. They have completely different properties and are able to neutralize to form H2O‚ which will be discussed later in a subsection. The table below compares the different properties between them: pH Scale Since acids increase the amount of H+ ions present and bases increase
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page ] 04.06 Properties of Compounds Acids and Bases Worksheet Before You Begin: You may either copy and paste this document into a word processing program of your choice or print this page. Directions: Answer the following questions in complete sentences. 1. Describe four properties of acids that you learned in this lesson. React with bases‚ react with metals‚ make things sour‚ cause stinging in cell membranes. 2. Describe four of the properties of bases that you learned in this lesson. Slippery‚
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