Chemistry Titration Essay - Paper Example Chemistry Titration Essay Titration is a method, which is meant to find the concentration of either an acid or a base by adding a measured amount of it to a known volume and concentration of an acid or Basel - Chemistry Titration Essay introduction. Titration starts with a beaker or Erlenmeyer flask containing a very precise volume of the known concentration solution and a small amount of Indicator, which Is put underneath a burette containing the solution with unknown concentrations. Small drops of the iterant are then added to the known solution and Indicator until the indicator changes which means the endpoint has been reached. Single drops of the iterant can sometimes make a permanent or temporary change In the Indicators.
The Volume of Titrant Added in order to reach the Endpoint and the Corresponding pH Values, observe the vertical line of each titration and see the points in which the horizontal lines intersect it. These points give the Equivalence Range. See Table 2 for values. The Volume of Titrant Added in order to reach the Endpoint and the Corresponding pH Values a perpendicular line from the midpoint of the vertical equivalence range is drawn so that it will intersect the y-axis.
The point at which it intersects the y-axis is the pH of the equivalence point. See Table 3 for values. Observations of colour changes of Acid-Base indicators during Titration. The titration of hydrochloric acid with sodium hydroxide resulted in a neutral equivalence point at a pH of 7.
Phenolphthalein, the acid-base indicator that was used in this titration, has a color change range of pH range of 8.
This indicator is unsuitable since it does not cover the range of the equivalence point which is 7. The titration of acetic acid with sodium hydroxide resulted with a slightly basic equivalence point at a pH of 8. Therefore, none of the indicators were suitable for the titrations they were involved with.
Methyl Red is the better indicator. Sources of Error There are numerous possible sources of error. The largest source of error in this experiment involves adding the titrant.
Although the procedures indicate to add 5. A possible solution is to use 0. Yet, due to the limitations of human skill at adding the titrant, it may be hard to achieve smaller amounts and more accurate results. Other sources of error include human errors. A solution to this problem is taking care when adding, mixing, or cleaning.
Conclusion By using acid-base titration, we found that the equivalence point of the titration of hydrochloric acid with sodium hydroxide was determined to be at a pH of 7.
The titration of acetic acid with sodium hydroxide resulted in the equivalence point of found pH 8. And the titration of ammonia with hydrochloric acid had an equivalence point at a pH of 5. The methyl red indicator and the phenolphthalein indicator were unsuitable because their pH ranges for their color changes did not cover the equivalence points of the trials in which they were used.
More essays like this:For this acid base titration lab it was legitimate to compare the outcomes with other classmates to determine if there were any anomalies between the data that was obtained. This is because it would have provided one with the knowledge of the types of errors that occurred and how much it affected their data.
We will write a custom essay sample on. We will write a custom essay sample on. Chemistry Acid-Base Titration. or any similar topic only for you. Order now. Chemistry Titration Lab; Acid and Base Report Qualitative Data; Determination of the Concentration of Acetic Acid in Vinegar;.
For the part II, the pH for the titration curve in strong acid-weak base titration, had a starting pH of 1. 04 due to the strong acid HCL. As the weak base, NH4OH was gradually added into the acid, the pH of the solution begins to increase. More Essay Examples on.
The end point is defined s when the correct ratio of acid and base are mixed together to neutralize the solutions. If the quantity of the acid and base necessary to reach the end point is equal, then the mixture is at its equivalence points.
For this acid base titration lab it was legitimate to compare the outcomes with other classmates to determine if there were any anomalies between the data that was obtained.
This is because it would have provided one with the knowledge of the types of errors that occurred and how much it affected their data. Acid-Base Titration Chemistry Formal Lab Writeup by regardbouddhiste.com acid-base titration, we determined the suitability of phenolphthalein and methyl red as acid base indicators.
We found that the equivalence point of the titration of hydrochloric acid with sodium hydroxide was not within the ph range of phenolphthalein's color range/5(22).