<p> Physical or Chemical? (Pages 6 & 9)</p><p>1. State whether each of the following sentences describes a chemical property or a physical property.</p><p> a. Solid potassium permanganate, KMnO4(s), exists at room temperature as purple crystals.</p><p> b. Gold can be hammered into thin sheets (it is malleable) and drawn into thin wires (it is ductile).</p><p> c. Sodium metal reacts with water to form dissolved sodium hydroxide, NaOH(aq), </p><p> and hydrogen gas H2(g).</p><p> d. Solid sodium chloride, NaCl(s), does not conduct electricity.</p><p> e. Magnesium, Mg(s), burns in air with a bright, white flame.</p><p> f. Ammonia, NH3(g), has a strong, distinct odour.</p><p>2. Classify each situation as either a physical change or a chemical change. Explain your reasoning.</p><p> a. A rose bush grows from a seed that you have planted and nourished.</p><p> b. A green coating forms on a copper statue when the statue is exposed to air.</p><p> c. Your sweat evaporates to help balance your body temperature.</p><p> d. Frost forms on the inside of a freezer.</p><p> e. Salt is added to clear chicken broth.</p><p> f. Your body breaks down the food you eat to provide energy for your body’s cells.</p><p> g. Juice crystals dissolve in water.</p><p> h. An ice-cream cone melts on a hot day. Qualitative or Quantitative?</p><p>1. Classify the following observations about the physical properties of diamond as qualitative or quantitative.</p><p> a. At room temperature, diamond is a clear, colourless, crystalline solid.</p><p> b. Diamond has no odour.</p><p> c. Diamond melts at 3800K.</p><p> d. Diamond has a density of 3.59g/cm3.</p><p> e. Diamond is neither malleable nor ductile.</p>