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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Chapter 2 – Culture Summary The concept of culture is sometimes easier to grasp by description rather than definition. All human groups possess culture‚ which consists of the language‚ beliefs‚ values‚ norms‚ and material objects that are passed from one generation to the next. Although the particulars of culture may differ from one group to another‚ culture itself is universal-all societies develop shared‚ learned ways of perceiving and participating in the world around them. Culture can be subdivided
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The Phyco-Solution Algae are emerging to be one of the most promising long-term‚ sustainable sources of biomass and oils for fuel‚ food‚ feed‚ and other co-products. What makes them so attractive are the large number and wide variety of benefits associated with how and where they grow. Nearly all these benefits stem from the fact that these plants have evolved over billions of years to produce and store energy in the form of oil‚ and they do this more efficiently than any other known natural or
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1.John is twice as old as his friend Peter. Peter is 5 years older than Alice. In 5 years‚ John will be three times as old as Alice. How old is Peter now? 2. John’s father is 5 times older than John and John is twice as old as his sister Alice. In two years time‚ the sum of their ages will be 58. How old is John now? 3. Joan is 3 times as old as her sister. In 3 yeas ‚ shee will be two years more than twice the age her sister will be then. What are their ages? 4. Kevin is 4 years older than
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Explain the problem of induction- Discuss two different solutions to it. The problem of induction is the philosophical issue of whether using induction to justify our beliefs is reasonable. We have memories and experience from past events that allow us to prepare for the future. Although the future is not certain‚ using generalizations and predictions‚ we can assume with some certainty that‚ what will happen tomorrow‚ will be similar‚ if not the same as what happened today. We use induction
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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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ECON112 Macroeconomics Problem Set 1 *Solution* By Yao Amber Li Fall 2010 (Instructor: Li‚ Yao; TA: Fok Pik Lin‚ Astor) ------------------------------------------------------------------------------------------------------------------------------------ 40 marks total Part I: True/False/Uncertain Please justify your answer with a short argument. (10 marks‚ 2 marks each) One mark is for correct judgment. One mark is for correct argument. 1. GDP is the value of all goods and services produced
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Analyse the problem of accounting fraud in a listed company and evaluate possible solutions In 2001‚ Enron Corporation went into bankruptcy due to the disclosure of false information in its financial statements. Similarly‚ when Lehman Brothers collapsed there was no evidence that it had ever publicly disclosed certain detrimental accounting information. Cases of accounting fraud such as these have become increasingly serious. Accounting fraud can result in creditors and stockholders losing confidence
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PG ENGINEERING SOLUTIONS ENTERS SECOND DECADE OF PROJECT MANAGEMENT INNOVATIONS MBA 6941 Project Management The title of my article is PG Engineering Solutions Enters Solutions Enters Second Decade Of Project Management Innovations and was written by Alexander Lopez from The Caribbean Business Newsletter. PGES is owned by Carlos Pesquera which is the former secretary for the Department of Transportation. His accomplishments include the $2 billion dollar grant to improve water system and the
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new invention has discovered a method to stabilise an enzyme during freezing providing the enzyme in a zwitteronic buffer solution. A zwitterionic composition is useful as a surface active agent in aqueous solutions. The buffer solution has the capacity to stabilise an enzyme‚ such as glocuse oxidase‚ in a liquid state whilst providing protection if the the end solution is frozen. The zwitterionic buffer can stabalise the activity of enzymes by preventing large pH shifts during freezing.
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