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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concentration of H+(aq) ions in the reaction mixture increases as the reaction proceeds. Hence the progress of the reaction can be followed by measuring the concentration of H+(aq) ions by titrimetric analysis. 9 F The hydrogen gas formed in the reaction between zinc and dilute hydrochloric acid CANNOT escape from a closed reaction vessel. Thus‚ the mass of the reaction mixture would NOT decrease as the reaction proceeds. 10 F It is difficult to measure the volume of water produced from the reaction between
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and alcohol continues‚ substance abuse across America has become a very serious social problem. It is mental illness that has an effect on different races‚ classes and genders. The affects of substance abuse has caused countless of people to feel heartache and develop feelings of hopelessness. With alcohol and drugs readily available through prescription or on the streets (Butler‚2010)‚ it is obvious why many are acquiring addictive patterns to these accessible substances‚ and that the continual
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“A Titration Competition” – Lab #8 1. Since all solutions and aqueous solutions have their own pH‚ it is important for all glassware to be clean and dry before performing a titration. Even a slight trace of a different solution could alter the pH and give an inaccurate titration reading. If the glassware is not completely dry after rinsing‚ the small traces of water could make the solution more dilute than it should be thus changing its concentration. 2. Air bubbles in the burette tip is a
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Solution A homogeneous mixture of two or more substances with each substance retaining its own chemical identity. Solute – substance being dissolved. Solvent – liquid water. General Properties of a Solution 1. Contains 2 or more components. 2. Has variable composition. 3. Properties change as the ratio of solute to solvent is changed. 4. Dissolved solutes are present as individual particles. 5. Solutes remain uniformly distributed and will not settle out with time. 6. Solute
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In the late 1700’s Benjamin Franklin wrote a document called “Information to Those Who Would Remove to America” it was a document that was a response to rumors that were floating around Europe during this time. Franklin was trying to let people know that America was not a land of the rich. It was a type of warning to the people of Europe that if they wanted to come here it was anything but easy‚ and things were not given out like hand outs. America at this time was anything but a simple place to
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www.os4ed.com | www.opensis.com openSIS Student Information System Quick Setup Guide For Community Edition 4.9 Last updated: January 2012 openSIS is a product of Open Solutions for Education‚ Inc. Contents Login to openSIS ................................................................................................................................................ 3 School Information .................................................................................................
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INTRODUCTION: This is an ADD report to Officer Silva’s #3809‚ PC 484(a)-Petty Theft investigation. INVESTIGATION: On 07-16-24‚ at approximately 0826 hours‚ Officer Silva #3809 and I responded to 360 N. Arroyo Boulevard regarding an active fight between two males. Officer Austin #0551 arrived on scene and detained Maldonado pending further investigation. It should be noted that Rango was standing above Maldonado upon Officer Austin’s arrival. Officer Calderon #2037 responded to assist. Upon our arrival
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ADD A BEGINNING Soccer was everything to me. I would go to my Mom and Dad and say “Lets go play soccer!” Add more right here. My dream was to go to OU and be on the women’s soccer team. Little did I know that was all going to change. I have done ballet‚ modern dance‚ gymnastics‚ but nothing really stuck out. Well‚ until I started playing soccer. I started playing soccer when I was 7. Soon all of my friends were on the same team as me. My best friend at the time dad coached us. It was great! Until
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of production‚ this ranges from: mining and recovery to refining‚ transporting and more importantly using it as fuel. Drilling wells is responsible for direct pollution due to oil spills; consequently‚ drilling also leads to the injection of watery liquids into the wells which are later distributed as drilling mud that often cause their own toxic pollution. Furthermore‚ the transporting of such oil by tanker ships have the potential to cause great disasters resulting from oil spills. In addition‚
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