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Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: QUANTITATIVE ANALYSIS. (PART 1.) INTRODUCTION. 1. Definition of Quantitative Analysis.?Quantitative analysis is that branch of chemistry which has for its object the study of the methods for the determination of the exact quantities of the different constituents of a substance. If it is required to merely ascertain the amount of one of the elements contained in a substance, the operation is called a determination. If the amount of each of the elements is required, the process is called an analysis. Qualitative analysis informs us what elements a substance contains, without reference to quantity; and quantitative analysis takes the subject up where qualitative analysts leaves it, and shows us the exact amount of each of these elements contained in the substance. For instance, by means of qualitative analysis we learn that a silver coin is composed of silver and copper, and, by noting the relative sizes of the precipitates obtained, we would judge that it contains more silver than copper, but more than this we cannot learn from qualitative analysis. Having learned by qualitative analysis that the coin is composed of silver and copper, we are now ready to subject it to a quantitative analysis, and by this means determine the exact amount of each of these elements that it contains. Obviously, the qualitative analysis precedes the quantitative, for we must know what elements a substance contains before we determine their amount. For notice of the copyright, see page immediately following the tille page. The methods employed to obtain these results vary greatly, and are based on different principles. Depending on the principles employed, the subject may be divided into three parts; viz., gravimetric analysis, volumetric analysis, and special methods. 2. Gravimetric Ana...