Irresistible Lab
Irresistible?
By Elizabeth Potter
December 5, 2012
Lab Section 503
Abstract The over all goal of the Irresistible lab was to verify a buffer’s ability to resist changes in pH with consecutive 1mL additions of either a strong acid (HCl) or base (NaOH). The experiment entailed preparing a combination 10 buffered and non-buffered solutions and then monitoring the pH changes as a strong acid or base was added to the solution. By performing this experiment, it was found that with increasing amounts of buffer in the prepared solutions there was better resistance against pH changes. This was because the strong acid or base was converted to it’s weak conjugate. The solution with little or no buffer had no resistance to pH changes. The Irresistible …show more content…
Lab was to analyze the properties that buffer posses when resisting changes in pH. This was done by “testing the ability of buffered and unbuffered solutions to resist changes in pH with the addition of strong acids and bases (Lab Manual 2012-2013).” To discover the buffer ability of a solution, 10 solutions were made with varying amounts of distilled water, NaCl, C2H3NaO2, and HC2H3O2. The beakers labeled with the numbers 1-5 were determining the buffer’s ability to neutralize the strong acid HCl. The beakers labeled 6-10 were utilized in determining the buffer’s ability to neutralize the strong …show more content…
When the amount of C2H3NaO2 increased and HC2H3O2 stayed the same, resistance to pH quantities increased. By keeping the HC2H3O2 concentration the same in each solution, we were able to identify the addition of more C2H3NaO2 as the sole factor causing increased resistance. The results found backup my group’s original hypothesis that predicted that greater amounts of C2H3NaO2 in the constant amount of HC2H3O2 would result in the greatest resistance to pH change by acting as a buffer in the solution. The buffer capacity, which is the increased about of acid or base that can be added to a buffer without destroying it’s effectiveness increased with greater amounts of C2H3NaO2. As the buffer ratio of C2H3NaO2 to HC2H3O2 increased in the solution, more acid or base was needed to destroy the buffer due to the solution’s advanced buffering capacity. When a buffer reaches capacity, the buffer has converted all the acid or base possible to it’s weakened conjugate form. Any additional amounts of acid or base after this point cause a rapid pH change in the solution. A possible experiment that builds on the concept that is explored in Irresistible? would be to compare buffer efficiency at varying temperatures. This new experiment would illustrate whether or not buffers have specific temperatures where they are most efficient or if buffers work at every temperatures. To
By Elizabeth Potter
December 5, 2012
Lab Section 503
Abstract The over all goal of the Irresistible lab was to verify a buffer’s ability to resist changes in pH with consecutive 1mL additions of either a strong acid (HCl) or base (NaOH). The experiment entailed preparing a combination 10 buffered and non-buffered solutions and then monitoring the pH changes as a strong acid or base was added to the solution. By performing this experiment, it was found that with increasing amounts of buffer in the prepared solutions there was better resistance against pH changes. This was because the strong acid or base was converted to it’s weak conjugate. The solution with little or no buffer had no resistance to pH changes. The Irresistible …show more content…
Lab was to analyze the properties that buffer posses when resisting changes in pH. This was done by “testing the ability of buffered and unbuffered solutions to resist changes in pH with the addition of strong acids and bases (Lab Manual 2012-2013).” To discover the buffer ability of a solution, 10 solutions were made with varying amounts of distilled water, NaCl, C2H3NaO2, and HC2H3O2. The beakers labeled with the numbers 1-5 were determining the buffer’s ability to neutralize the strong acid HCl. The beakers labeled 6-10 were utilized in determining the buffer’s ability to neutralize the strong …show more content…
When the amount of C2H3NaO2 increased and HC2H3O2 stayed the same, resistance to pH quantities increased. By keeping the HC2H3O2 concentration the same in each solution, we were able to identify the addition of more C2H3NaO2 as the sole factor causing increased resistance. The results found backup my group’s original hypothesis that predicted that greater amounts of C2H3NaO2 in the constant amount of HC2H3O2 would result in the greatest resistance to pH change by acting as a buffer in the solution. The buffer capacity, which is the increased about of acid or base that can be added to a buffer without destroying it’s effectiveness increased with greater amounts of C2H3NaO2. As the buffer ratio of C2H3NaO2 to HC2H3O2 increased in the solution, more acid or base was needed to destroy the buffer due to the solution’s advanced buffering capacity. When a buffer reaches capacity, the buffer has converted all the acid or base possible to it’s weakened conjugate form. Any additional amounts of acid or base after this point cause a rapid pH change in the solution. A possible experiment that builds on the concept that is explored in Irresistible? would be to compare buffer efficiency at varying temperatures. This new experiment would illustrate whether or not buffers have specific temperatures where they are most efficient or if buffers work at every temperatures. To