A buffer solution can maintains a narrow range of pH even when strong acid are added. In our experiment‚ we can see water is not a buffer‚ water can undergo very big changes when small amounts of strong acid or strong bases are added. When the strong acid‚ 100µl HCl was added into the dd water‚ the pH value changed from 7.38 to 5.83 which mean the dd water has turn into acid. The same phenomenon occurs while strong base‚ 100µl NaOH was added into the dd water. The pH value changed from 7.07 to 9
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SOLUTION TO HOMEWORK PROBLEMS Chapter-4: MOTION IN TWO DIMENSIONS 1 A particle starts from the origin at t = 0 with a velocity of 6.0[pic] m/s and moves in the xy plane with a constant acceleration of (-2.0[pic] + 4.0[pic]) m/s2. At the instant the particle achieves its maximum positive x coordinate‚ how far is it from the origin? [pic] 2 At t = 0‚ a particle leaves the origin with a velocity of 5.0 m/s in the positive y direction. Its acceleration is given by [pic] = (3.0[pic] - 2.0[pic])
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Chapter 5 Ethernet LANs Lab 5.1: LAN Standards Exercise 5.1.1 IEEE 802.1 handles the architecture‚ security‚ management and internetworking of local area networks (LAN)‚ metropolitan area networks (MAN) and wide area networks (WAN) standardized by IEEE 802. Exercise 5.1.2 Power over Ethernet is defined by a standard set forth by the IEEE 802.3af task force. Exercise 5.1.3 Standard Cabling Maximum Length 10BASE5
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OUTLINE SOLUTIONS Regression Modelling (ST2210) Internal test (30%) 12th November 2010 KNumber Name Course Duration: 90 mins Instructions: Answer all questions in the spaces provided – (you may use backs of sheets and/or additional paper if required) This is a CLOSED BOOK test. You can consult the test paper‚ KU tables and the attached output ONLY. You may use an approved calculator. Use a 5% level of significance (α = 5%) where appropriate. Fanfare International
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CHAPTER 5 The Time Value of Money CHAPTER ORIENTATION In this chapter the concept of a time value of money is introduced‚ that is‚ a dollar today is worth more than a dollar received a year from now. Thus if we are to logically compare projects and financial strategies‚ we must either move all dollar flows back to the present or out to some common future date. CHAPTER OUTLINE I. Compound interest results when the interest paid on the investment during the first period
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Electrolytic Solutions Solutions are sometimes grouped according to their ability to conduct electricity. Substances whose solutions conduct electricity are called electrolytes and those that do not conduct electricity are called nonelectrolytes. Also electrolytes can be strong or weak. Under strong electrolytes we have NaCl and CaCl2 which are ionic compounds‚ HCI‚ HNO3‚ HBr and H2SO4 are under acids and NaOH‚ KOH‚ and LiOH are under bases. Weak electrolytes are ionic compounds and slightly
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Rachel Bohnenberger Professor Van Doorn ENVS 150-002 30 January 2015 Critique Two In the first video‚ The Story of Solutions‚ the main focus was to shift attention from making more and more for the economy to making the economy better. It was described in the video that in order to make the economy better‚ we need to focus our attention on sustainability. One example given was banning plastic bags. Two methods were given on how to accomplish said task—the old method and the new method. The old
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Joscely Garris Professor Vinh Hoang CHEM 1151L – 254 25 October 2013 Preparation of Viscous Solution This report discusses an experiment to study the relationship of solute/solvent and the calculations involved to measure the concentration of the solution. The first experiment to take place is the preparation of a salad dressing using xanthan gum solution‚ water and oil. Commonly used as a food thickening agent‚ Xanthan gum is a large molecule composed of several saccharides linked together
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Harmantaj sahota sahot111 103776105 Professor Oriet 10 march‚ 2013 Inventing solutions “To invent u need a good imagination and a pile of junk.” –Thomas Edison Inventing solutions and inventions is familiar to us in science and engineering. We use the word ‘invention’ in creative endeavours such as mathematics‚ music‚ literature and sometimes in fine art too. In a broader context invention can be
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Refining Solutions Paper How do you protect yourself from becoming a victim of identity theft? A credit card statement with gas charges originating in Louisiana was the first sign of trouble. The owner of the card had not traveled to Louisiana during the dates of the charges‚ which indicated there was a problem. The feeling of anxiety and frustration took over because security was in place to prevent fraud. There are many ways thieves can access one’s personal information. According to CIPPIC
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