The Unknown Concentration Of Nahco3 (Aq) Through Titration
Determining the Unknown Concentration of NaHCO3 (aq) Through Titration
Introduction
Titration is the accurate addition of a titrant- solution in a burette- into a measured volume of a sample (Kessel, 2003). There are many different types of titration, such as acid-base reaction, redox reactions, precipitation reaction and more (Dohrman). In this lab an acid base titration will be explored. In an acid-base titration, the concentration of an acid or base is unknown and is determined by the adding (from a burette) a solution of known concentration (titrant). Titration is used in many different fields such as medicine to determine different concentrations of chemicals in the blood. It is also used in food industry to determine the concentration …show more content…
However, for the titration of HCl(aq) with the same titrant, 21.2 mL was added (Figure 2) and the concentration was calculated to be 0.377 M. Since the same titrant is used in both titrations, the calculated concentration in each part should have also been the same. However, the concentration calculated for NaHCO3(aq) was not the same and there was a 73.68% percent difference between the two values. During the titration process the following errors may have caused such a large percent difference to …show more content…
Due to drop in the volume of NaHCO3 in the burette, the addition of more NaHCO3 into the burette caused the data to be imprecise (Figure 1 Note). This also results in deviating from the procedure, which may have caused the misreading of the volume after more solution was added in the burette. This will result in imprecise value calculated for the volume of NaHCO3 (aq) added in the first titration (Figure 1). Due to this all other calculations based on this amount will be incorrect. This error could be improved by always making sure to start the titration with a full burette so there is a less chance of the titrant running low, in result reducing the need to add more titrant and make a
Introduction
Titration is the accurate addition of a titrant- solution in a burette- into a measured volume of a sample (Kessel, 2003). There are many different types of titration, such as acid-base reaction, redox reactions, precipitation reaction and more (Dohrman). In this lab an acid base titration will be explored. In an acid-base titration, the concentration of an acid or base is unknown and is determined by the adding (from a burette) a solution of known concentration (titrant). Titration is used in many different fields such as medicine to determine different concentrations of chemicals in the blood. It is also used in food industry to determine the concentration …show more content…
However, for the titration of HCl(aq) with the same titrant, 21.2 mL was added (Figure 2) and the concentration was calculated to be 0.377 M. Since the same titrant is used in both titrations, the calculated concentration in each part should have also been the same. However, the concentration calculated for NaHCO3(aq) was not the same and there was a 73.68% percent difference between the two values. During the titration process the following errors may have caused such a large percent difference to …show more content…
Due to drop in the volume of NaHCO3 in the burette, the addition of more NaHCO3 into the burette caused the data to be imprecise (Figure 1 Note). This also results in deviating from the procedure, which may have caused the misreading of the volume after more solution was added in the burette. This will result in imprecise value calculated for the volume of NaHCO3 (aq) added in the first titration (Figure 1). Due to this all other calculations based on this amount will be incorrect. This error could be improved by always making sure to start the titration with a full burette so there is a less chance of the titrant running low, in result reducing the need to add more titrant and make a