Friday, March 20, 2020

Leadership Through Example essays

Leadership Through Example essays The most important aspect of any culture is the people. Great nations like the United States were establish through the understanding that people are the most valuable resource of a nation, and it is the responsibility of the leaders to ensure that the people are respected. The central focus of a good leader should always be to maintain the well being of the people - especially during time of war. This understanding breeds patriotism and heroes. A prime example of good leadership is exemplified in Chief Crazy Horse of the Sioux Tribe during the 19th century when the migrating European and American settlers were expanding westward. Chief Crazy Horse recognized that the settlers had no respect for his land, beliefs or his people. He valiantly defended his culture against the intrusion of the settlers, and placed his love and respect for his people above everything. Chief Crazy Horse is a prime candidate for the presidency because he demonstrated great integrity by building a leadership based solely on a tremendous respect for his people. Crazy Horse had enormous respect for his people as individuals. Perhaps the single most important ingredient for successful leadership is respect. He considered the lives of his people equal or even more important than his own. One way in which this was demonstrated was on the battlefield. Numerous accounts and paintings of battle scenes reveal that during an assault, as Crazy Horse led his men into battle, never allowing any of his warriors to pass him. "In advancing upon an enemy, none of his warriors were allowed to pass him" ("Crazy Horse Quotes"). Crazy Horse was also a generous man. He was known to have consistently shown charity toward the poor, lived a humble life and given away spoils of war (with the exception of weapons.) "It was a point of honor with him never to keep anything for himself, excepting weapons of war" ("Crazy Horse Quotes"). As a result of the respect Crazy Horse displayed fo...

Wednesday, March 4, 2020

Neutralizing a Base With an Acid

Neutralizing a Base With an Acid When an acid and a base react with each other, a neutralization reaction occurs, forming a salt and water. The water forms from the combination of the H ions from the acid and the OH- ions from the base. Strong acids and strong bases completely dissociate, so the reaction yields a solution with a neutral pH (pH 7). Because of the complete dissociation between strong acids and bases, if youre given a concentration of an acid or base, you can determine the volume or quantity of the other chemical required to neutralize it. This example problem explains how to determine how much acid is needed to neutralize a known volume and concentration of a base: Solving an Acid-Base Neutralization Problem What volume of 0.075 M HCl is required to neutralize 100 milliliters of 0.01 M Ca(OH)2 solution? HCl is a strong acid and will dissociate completely in water to H and Cl-. For every mole of HCl, there will be one mole of H. Since the concentration of HCl is 0.075 M, the concentration of H will be 0.075 M. Ca(OH)2 is a strong base and will dissociate completely in water to Ca2 and OH-. For every mole of Ca(OH)2 there will be two moles of OH-. The concentration of Ca(OH)2 is 0.01 M so [OH-] will be 0.02 M. So, the solution will be neutralized when the number of moles of H equals the number of moles of OH-. Step 1: Calculate the number of moles of OH-.Molarity moles/volumemoles Molarity x Volumemoles OH- 0.02 M/100 millilitersmoles OH- 0.02 M/0.1 litersmoles OH- 0.002 molesStep 2: Calculate the Volume of HCl neededMolarity moles/volumeVolume moles/MolarityVolume moles H/0.075 Molaritymoles H moles OH-Volume 0.002 moles/0.075 MolarityVolume 0.0267 LitersVolume 26.7 milliliters of HCl Performing the Calculation 26.7 milliliters of 0.075 M HCl is needed to neutralize 100 milliliters of 0.01 Molarity Ca(OH)2 solution. The most common mistake people make when performing this calculation is not accounting for the number of moles of ions produced when the acid or base dissociates. Its easy to understand: only one mole of hydrogen ions is produced when hydrochloric acid dissociates, yet also easy to forget its not a 1:1 ratio with the number of moles of hydroxide released by calcium hydroxide (or other bases with divalent or trivalent cations). The other common mistake is a simple math error. Make sure you convert milliliters of solution to liters when you calculate the molarity of your solution!