Essay on A Strong Acid Base With A Weak Acid Or Base Yield Results

2238 Words Apr 11th, 2016 9 Pages
Titrations of a strong acid or base with a weak acid or base yield results that greatly differ then a strong-strong titration. The strong-weak titrations allow for an in depth analysis of the half-equivalence point as well as buffers. The half equivalence point allows the calculation of pH from pKa, as they are both equal at the half equivalence point, proven by the Henderson Hasslbach equation. It was Henderson in 1908 that created an equation allowing for the logarithmic calculation for pH from a buffer and the pKa which consequently lead to the knowledge and applications of buffers that we have today. Buffers were also analyzed in the experiment as buffers consist of equal molar rations of a weak acid and its conjugate base, which then subsequently gives the strong substance something to donate to consequently minimizing pH change until the buffering capacity is reached. The moles of each substance in the buffer was done using the equation of C1*V1=C2*V2. The buffering capacity was calculated by examining how many moles of NaOH or HCl it took to raise the pH of the buffer solution by one unit of pH. In the real world buffers have an important role in biology as some bacteria utilize and create buffer solutions in order to survive and low pH environments such as the stomach, therefore understanding how buffers work is important for creating drugs and treatments to prevent infection and growth of such microbes. All the calculations were then compared to the expected…

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