Laboratory Report
PREPARATION OF A STANDARD ACID SOLUTION NAME: ADDISON JOSHUA HUGHES ID: 1511907 EXPERIMENT: A.2.2.3. DEMONSTRATOR: RICHARD TIA DATE: 2ND APRIL, 2009.
AIM
To prepare and standardize HCl solution.
INTRODUCTION
Standardization is a process of determining the relationship between the measured signal and the amount of analyte. Standardization can be defined also as a titration experiment in which the concentration of a solution becomes known to a high degree of precision and accuracy. In a standardization experiment, the solution being standardized is compared to a known standard. This known standard can be either a solution that is already a standard solution or an accurately weighed solid material. The accuracy of standardization depends on the glassware and quality of the reagent used to prepare the standard. Reagents used as standards are divided into primary reagent and secondary reagent. A primary reagent can be used to prepare a standard containing an accurately known amount of analyte. A primary reagent must have a known stoichiometry, a known purity (or assay) and be stable during a long term storage both in solid and solution form. The purity of a secondary reagent in a solid form or the concentration of a standard prepared from a secondary reagent must be determined relative to a primary reagent. A 0.1M HCl solution is to be prepared from a stock solution and standardized using sodium carbonate. This is done by measuring a
AIM
To prepare and standardize HCl solution.
INTRODUCTION
Standardization is a process of determining the relationship between the measured signal and the amount of analyte. Standardization can be defined also as a titration experiment in which the concentration of a solution becomes known to a high degree of precision and accuracy. In a standardization experiment, the solution being standardized is compared to a known standard. This known standard can be either a solution that is already a standard solution or an accurately weighed solid material. The accuracy of standardization depends on the glassware and quality of the reagent used to prepare the standard. Reagents used as standards are divided into primary reagent and secondary reagent. A primary reagent can be used to prepare a standard containing an accurately known amount of analyte. A primary reagent must have a known stoichiometry, a known purity (or assay) and be stable during a long term storage both in solid and solution form. The purity of a secondary reagent in a solid form or the concentration of a standard prepared from a secondary reagent must be determined relative to a primary reagent. A 0.1M HCl solution is to be prepared from a stock solution and standardized using sodium carbonate. This is done by measuring a