The fields of science and technology rely very much on measurements of physical and chemical properties of materials for these are central in defining the nature of substances or quantifying them. Some of the concepts involved in measurements such as mass, volume, concentration you would have come across in the earlier modules. There are others you will be meeting for the first time in this module,that have to do with determining the identity of a substance based on quantitative analysis. The set of pre-assessment questions below are meant to help you assess your level of mastery of the concepts on measurements that are most often used by chemists to determine a specific chemical property. Some questions which will be new to you have been included. Such questions are meant to give you some idea as to what to expect in this module that deals with various aspects of volumetric analysis.