the strong acids that have the lowest pH‚ the strong bases that have the highest pH‚ and the neutral solutions that have a pH near 7. The weak acids will have a pH between 1 and 6 and the weak bases between 8 and 14. The exact order of weak acids and weak bases is determined by comparing the ionization constants (Ka for the weak acids and Kb for the weak bases). After ranking the pH of these solutions‚ you will then test your predictions in the laboratory. 1. Arrange the following
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Due Date: February 15‚ 2011 Resonance Benzenesulfonic Acid Benzoic Acid Benzyl Alcohol Benzylamine P-Cresol P-Toluidine Acid/Base | Structure | pH | Why It is a strong/weak acid/base | Benzenesulfonic Acid | | 1 | This is a strong acid because it has a pH of 1. Another reason why this is a strong acid is that its conjugate base has strong resonance stabilization. | Benzoic Acid | | 3 | This is a strong acid because
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Nick Boyea Billy Lee 3/9/11 Molar Mass by Freezing Point Depression Overview The purpose of this lab is to measure the freezing point depression of a solution of an unknown substance and BHT to determine the molar mass of the unknown substance. Summary of Lab Procedure If not already completed‚ crush a small amount of BHT and pack it into a capillary tube. Use a small rubber band to clamp the capillary tube to the thermometer‚ and fasten the thermometer to a ring stand. Fill a Thiele tube
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Part one: The Lab You will be helping Galileo perform the experiment to determine if objects with different mass fall at the same‚ or different‚ rates in the air and in a vacuum. Before you conduct your experiment‚ you need to form a hypothesis. A hypothesis is a prediction of what you think will happen in the experiment. The hypothesis is a statement that describes “if” a certain set of circumstances are present “then” there will be a specific result that will occur. Record your hypothesis here:
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The universe is governed by four fundamental forces‚ or interactions. These forces are the strong nuclear force‚ weak nuclear force‚ electromagnetic force‚ and gravity. The first two forces work on the atomic level but we can observe gravity and electromagnetism every day. Without these four fundamental forces of nature working together‚ our world would break apart and float aimlessly into oblivion. The strongest of the four fundamental forces of nature is the strong nuclear force‚ also called the
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CEIT-02-301A FUNDAMENTAL FORCES OF NATURE There are four fundamental forces of nature that have been identified the universe‚ namely‚ Weak Force‚ Strong Force‚ Electromagnetic Force and Gravitational Force. They are found to have rather different properties and play central roles in making the universe what it is today. Weak force is a force between elementary particles that causes certain processes that take place with low probability‚ as radioactive beta-decay and collisions
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(1) Evaporation: Surface Area: Evaporation is surface phenomenon.Greater is surface area greater is evaporation and vice versa.For example‚ sometimes a saucer is used if tea is to be cooled‚ quickly.This is because evaporation from the larger surface area of saucer is more than that of the smaller surface area of the tea cup. Temperature: At high temperature‚ rate of evaporation is high because at high temperature
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Porter is a recognized leader in competitive analysis elaboration and his five forces model has contributed to the study of competition (Porter 1979). It is necessary to point out that Porter’s approach to alternative strategies’ generation is a well-defined one and is based on the following statement: Company’s position stability in a market is determined by: costs of production and marketing of goods; irreplaceable products; competition’s sphere (the volume of market adaptation). A company
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Wilson’s Fourteen Points vs. Treaty of Versailles World War One was a tragedy that affect not one but many countries. It brought destruction‚ starvation‚ enemies‚ and death not only of soldiers but of normal civilians. There were two proposals created to end World War One: Wilson’s Fourteen Points and the Treaty of Versailles. They were both created to bring peace between the countries. However‚ they both had their positives and negative effects. Wilson’s Fourteen Points would have more independent
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============================================================================ 1. (22 points) _____ 2. (12 points) _____ 3. (27 points) ____ 4. (15 points) _____ 5. (24 points) _____ Total (100 points) _________________ Your Name(print):___ANSWER KEY Your TA’s Name (print):___________________ Fall 2009‚ 5.111 Exam #3 solution key Problem 1 (22 points total; 2 points each question). Page 2 of 10 Give one example of each of the following: (i) a pure
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