Learning Objectives By the end of this section, you will be able to: The previous section introduced molarity, a very useful measurement unit for evaluating the concentration of solutions. However, molarity is only one measure of concentration. This section will…
Learning Objectives By the end of this section, you will be able to: Preceding sections of this chapter focused on the composition of substances: samples of matter that contain only one type of element or compound. However, mixtures—samples of matter…
Learning Objectives By the end of this section, you will be able to: The previous section discussed the relationship between the bulk mass of a substance and the number of atoms or molecules it contains (moles). Given the chemical formula…
Learning Objectives By the end of this section, you will be able to: Many argue that modern chemical science began when scientists started exploring the quantitative as well as the qualitative aspects of chemistry. For example, Dalton’s atomic theory was…
Figure 3.1 The water in a swimming pool is a complex mixture of substances whose relative amounts must be carefully maintained to ensure the health and comfort of people using the pool. (credit: modification of work by Vic Brincat) Chapter Outline 3.1 Formula…
Early Ideas in Atomic Theory The ancient Greeks proposed that matter consists of extremely small particles called atoms. Dalton postulated that each element has a characteristic type of atom that differs in properties from atoms of all other elements, and…
Learning Objectives By the end of this section, you will be able to: Nomenclature, a collection of rules for naming things, is important in science and in many other situations. This module describes an approach that is used to name…
Learning Objectives By the end of this section, you will be able to: In ordinary chemical reactions, the nucleus of each atom (and thus the identity of the element) remains unchanged. Electrons, however, can be added to atoms by transfer…
Learning Objectives By the end of this section, you will be able to: As early chemists worked to purify ores and discovered more elements, they realized that various elements could be grouped together by their similar chemical behaviors. One such…
Learning Objectives By the end of this section, you will be able to: A molecular formula is a representation of a molecule that uses chemical symbols to indicate the types of atoms followed by subscripts to show the number of atoms of…