Essays on Molarity

Aims and Objectives of the Experiment

The main objective of this experiment is to determine the concentration of different substances. This is achieved by determining the end point(s) of different titrations using the automated potentiometric titrator. These points are known as equivalence points. The units of measurement are the standard units used in titrations i.e. Molarity (moles/liter) of substances used while the quantities of these substances are measured in mL (milliliter).

Theory and Principles

Potentiometric titration is a volumetric method which measures the potential between two electrodes, namely reference and indicator, with the change in the volume of the reagent that is added, known as the titrant. ...

Question 1: Why is it necessary to use water that is both distilled and at room temperature when doing dilutions?

Answer: It is necessary to use distilled water for dilutions in order to avoid any reactions or alterations caused by the minerals, or any other impurities, present in water that is not distilled. The water should be at room temperature, in combination with being distilled, so that it does not support any side reactions that may be caused by the increased or decreased temperature. Question 2: Outline an experimental procedure (step by step) by which 25.00 mL of 1.00 M HCl can be made from a stock solution of 5.00 M HCl.

Answer: The steps for preparing a 1M HCl from 5M HCl are as follows.

The required solution is prepared by diluting ...

There are various ions that are responsible for the acidic or basic nature of a substance. The hydrogen ions and hydroxide ions are both responsible for the acidic and basic nature of substance respectively. A neutral substance contains equal number of hydrogen ions (H+) as well as hydroxide ions (OH-) An acid is substance that dissolve and donate hydrogen ions leading to more number of hydrogen ions in a solution. A substance that dissolves water and release hydroxide ions is considered a base. A base has more number of hydroxide ions as compared to hydrogen ions hence basic. Alkalinity ( ...

Introduction

A pipette is one of the laboratory instruments utilized in the transportation of a measured volume of fluids. Therefore, the general use of a pipette is to transfer a specific volume of a fluid from one container (measuring cylinder) to another. There are several types of pipettes. They include; Volumetric, graduated, automated pipettes, micropipettes and disposable pipettes. But for the sake of the video, we will concentrate of two: Volumetric and graduated pipettes.

These pipettes are used to transport a single specific volume of a fluid, typically between 1 and 100 ml. They are shaped like rolling pins with a huge belly, one blunted end (the ...