Chemistry Chapter 2 Flashcards

Intensive and extensive properties

Every sample of a given substance has the same chemical composition.

Solid, Liquid, Gas

<p>Physical changes are either reversible or irreversible.</p> Signup and view all the answers

<p>Color; sodium chloride is the only white solid listed.</p> Signup and view all the answers

<p>Liquids and gases have an indefinite shape; the shape of a solid is definite, while the shape of a liquid is indefinite.</p> Signup and view all the answers

<p>The freezing of mercury is reversible because solid mercury can be melted.</p> Signup and view all the answers

<p>Samples of gold and copper can have the same mass and volume (extensive properties) but cannot have the same set of intensive properties because they have different chemical compositions.</p> Signup and view all the answers

<p>As heterogeneous or homogeneous.</p> Signup and view all the answers

<p>Differences in physical properties.</p> Signup and view all the answers

<p>A phase is any part of a sample with uniform composition; there is one phase in a homogeneous mixture and two or more phases in a heterogeneous mixture.</p> Signup and view all the answers

<p>food coloring = Homogeneous Ice cubes in liquid water = Heterogeneous Mouthwash = Homogeneous Mashed, unpeeled potatoes = Heterogeneous</p> Signup and view all the answers

<p>Both have a uniform composition throughout; a substance has a definite composition, while a solution has a variable composition.</p> Signup and view all the answers

<p>Filtration separates solids from a liquid in a heterogeneous mixture; distillation can separate a liquid from substances dissolved in a liquid.</p> Signup and view all the answers

<p>Add water to dissolve the salt, pour the resulting mixture onto a piece of closely woven cloth, then use evaporation to remove the water from the salt solution.</p> Signup and view all the answers

<p>Compounds can be broken down into simpler substances by chemical means, but elements cannot.</p> Signup and view all the answers

<p>A substance has a fixed composition, while the composition of a mixture may vary.</p> Signup and view all the answers

<p>Chemical symbols are used to represent elements, and chemical formulas are used to represent compounds.</p> Signup and view all the answers

<p>Heating or an electric current.</p> Signup and view all the answers

<p>Table sugar = Compound Tap water = Mixture Cough syrup = Mixture Nitrogen = Element</p> Signup and view all the answers

<p>A. Pb, B. O, C. Ag, D. Na, E. H, F. Al</p> Signup and view all the answers

<p>a. Carbon, b. Calcium, c. Potassium, d. Gold, e. Iron, f. Copper</p> Signup and view all the answers

<p>Carbon, hydrogen, oxygen, and nitrogen; hydrogen is present in the greatest proportion.</p> Signup and view all the answers