chemistry report
FACULTY OF RESOURCE SCIENCE AND TECHNOLOGY
DEPARTMENT OF CHEMISTRY
STK 1094 – Analytical Chemistry 1
EXPERIMENT NO :
1
TITLE OF EXPERIMENT :
ACID – BASE TITRATIONS
DATE OF EXPERIMENT
:
27 SEPTEMBER 2013
GROUP MEMBERS &
MATRIX NUMBERS
:
1. DELVINO DISONNEO ANAK DALIN (44903)
2. GOH CHIA HONG (44927)
3.LINDA CHONG (41889)
4.LIM WHYE KIT LEONARD(41874)
5.
LAB FACILITATOR
:
REPORT DUE DATE
:
4 OCTOBER 2013
INTRODUCTION
The laboratory method used in the experiment 1 is titration. The technique of titration finds many applications, but is especially useful in the analysis of acidic and basic substances. Titration involves measuring the exact volume of a solution of known concentration that is required to react with a measured volume of a solution of unknown concentration, or with a weighed sample of unknown solid. A solution of accurately known concentration is called a standard solution. In titration, standard solutions are now usually expressed in terms of molarity, M :
In many cases it is possible to prepare a standard solution by accurate weighing of the solute, followed by precise dilution to an exactly known volume in a volumetric flask. One of the most common standard solutions used in acid-base titration analysis, however, cannot be prepared in this manner.
Solutions of sodium hydroxide are commonly used in titration analysis of samples containing an acidic solute. Although sodium hydroxide is a solid, it is not possible to prepare standard sodium hydroxide solutions by mass. Solid sodium hydroxide is usually of questionable purity. Sodium hydroxide reacts with carbon dioxide from the atmosphere and is also capable of reacting with the glass of the container in which it is provided. For there reasons, sodium hydroxide solutions are generally prepared to be approximately a given concentration. They are then standardized by titration of a weighed sample of a primary standard
DEPARTMENT OF CHEMISTRY
STK 1094 – Analytical Chemistry 1
EXPERIMENT NO :
1
TITLE OF EXPERIMENT :
ACID – BASE TITRATIONS
DATE OF EXPERIMENT
:
27 SEPTEMBER 2013
GROUP MEMBERS &
MATRIX NUMBERS
:
1. DELVINO DISONNEO ANAK DALIN (44903)
2. GOH CHIA HONG (44927)
3.LINDA CHONG (41889)
4.LIM WHYE KIT LEONARD(41874)
5.
LAB FACILITATOR
:
REPORT DUE DATE
:
4 OCTOBER 2013
INTRODUCTION
The laboratory method used in the experiment 1 is titration. The technique of titration finds many applications, but is especially useful in the analysis of acidic and basic substances. Titration involves measuring the exact volume of a solution of known concentration that is required to react with a measured volume of a solution of unknown concentration, or with a weighed sample of unknown solid. A solution of accurately known concentration is called a standard solution. In titration, standard solutions are now usually expressed in terms of molarity, M :
In many cases it is possible to prepare a standard solution by accurate weighing of the solute, followed by precise dilution to an exactly known volume in a volumetric flask. One of the most common standard solutions used in acid-base titration analysis, however, cannot be prepared in this manner.
Solutions of sodium hydroxide are commonly used in titration analysis of samples containing an acidic solute. Although sodium hydroxide is a solid, it is not possible to prepare standard sodium hydroxide solutions by mass. Solid sodium hydroxide is usually of questionable purity. Sodium hydroxide reacts with carbon dioxide from the atmosphere and is also capable of reacting with the glass of the container in which it is provided. For there reasons, sodium hydroxide solutions are generally prepared to be approximately a given concentration. They are then standardized by titration of a weighed sample of a primary standard
References: Tan.Y.T., Loh.W.L., Kathirasan Muniandy. (2011) Ace ahead chemistry volume 1. Selangor, Malaysia ; Oxford Fajar. Tan.Y.T.,Ashy Kumren. (2011) Chemistry for Matriculation, Selangor, Malaysia : Oxford Fajar.