![]() Phase changes involve changing the state of a particular substance through heating/cooling or (less commonly) changing the pressure on a substance.Conversely, you can – by various different means such as filtering or selectively dissolving components – separate components of a mixture.For example, I can dissolve drink powder to water. You can create mixtures by mixing two substances together into a mixture.There are a number of important classes of physical changes that you need to know about: These properties can be observed without observing any change at the molecular level. These properties are associated with the substance rather than its molecular structure – that is, without changing the identity of the substance. In the first part of this experiment, you will focus on classifying changes in matter as either physical changes or chemical changes. These changes and properties can be classified as physical or chemical properties. If you overcook a steak, it chars and you see black bits on it.įurthermore, substances can change from one form to another, with some different properties.When you add Alka-Seltzer to some vinegar, you see bubbles form.A solution of copper (II) sulfate is blue.When you heat water to about 100☌, it boils.Substances can be identified by different properties that they can have. 7.2 Introduction Chemical and Physical Properties Tro, Chemistry: Structures and Properties, 2nd Ed, Ch. Use reference works to determine strategies to separate different substances.Determine the mass of different objects, and calculate the percent by mass of a substance.Utilize the properties of pure substances to separate the components of a simple mixture.Identify the differences between chemical and physical properties, and to observe some of the properties of particular pure substances. ![]() ![]() Identify the differences between chemical and physical changes under similar experimental conditions. ![]()
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