Pure substances and MixturesOnline version In this section students will be able to identify the characteristics of pure substances and the differences between mixtures. by Haynon Masiding 1 Anything that has mass and takes up space a weight b molecule c matter d volume 2 Every sample of a pure substance is either an element, a compound, or a a atom b molecule c element d mixture 3 Every sample of a pure substance is either an element, a compound, or a a atom b molecule c element d mixture 4 Type of pure substance that cannot be separated into simpler substance by physical means a element b compound c molecule d atom 5 The smallest unit of an element that keeps the element's chemical properties is a(n) a molecule b element c compound d atom 6 Each_________ of a compound contains two or more elements that are chemically combined a atom b molecule c element d compound 7 A sample of matter, either a single element or a single compound that has a definite chemical and physical property is classified as a molecule b element c pure substance d mixture 8 Combination of two or more substances that are not chemically combined a mixture b pure substance c diatomic molecule d compound 9 Which of the following is a mxture? a air b salt c water d sulfur 10 If you add oil to water and shake the liquid you will form a a pure substance b miscible liquid c heterogenous mixture d homogenous mixture 11 The label on a bottle states "Shake well before using it". The medicine is probably a a solution b suspension c colloid d gel 12 Which of the following is a solid dissolved in a solid a smoke b bronze c mayonnaise d ice 13 In a solution, the substance in which the solute dissolves Written answer 14 Example of liquid solution that contains no water Written answer 15 The process of pouring a less dense liquid off a denser liquid is called Written answer 16 Classify the following as homogenous or heterogenous mixtures a. orange juice with pulp b. sweat c. cinnamon sugar d. concrete Written answer 17 Classify the following as element or compound a. sulfur b. carbon dioxide c. alcohol d. iron Written answer 18 23000 mg of lead are mixed with 500 grams of water. Find the percentage of lead in this solution. Written answer 19 List 5 different ways to separate mixtures and give a brief description of each Written answer 20 Watch the following video. At the end of this process, can we say that water has been separated from other substances just by physical means or chemical means heve been used as well?. Explain Written answer 21 Explain why an alloy is a type of solution. Why are alloys sometimes used instead of pure metals? Written answer 22 What is a mixture? a A physical combination of two or more substances. b A pure substance c A chemical reaction d An element 23 How can mixtures be separated? a Through chemical reactions b By adding more substances c By heating to high temperatures d Through physical methods like filtration or distillation. 24 What is a homogeneous mixture? a A mixture with uniform composition throughout. b A mixture with only one substance c A mixture with visible particles d A mixture that can't be separated 25 What is a heterogeneous mixture? a A mixture with non-uniform composition. b A mixture that is always liquid c A mixture that can't be separated d A mixture with only one substance 26 What is a solution? a A heterogeneous mixture b A chemical compound c A homogeneous mixture of two or more substances. d A pure substance 27 What is a solute? a The substance that is dissolved in a solution. b The physical state of a solution c The solvent in a solution d The mixture formed in a solution 28 What is a solvent? a The mixture formed in a solution b The solute in a solution c The substance that dissolves the solute in a solution. d The physical state of a solution 29 What is a suspension? a A solution b A homogeneous mixture c A heterogeneous mixture with visible particles that settle over time. d A chemical compound 30 What is a colloid? a A heterogeneous mixture b A homogeneous mixture c A mixture with particles that are intermediate in size between a solution and a suspension. d A pure substance 31 What is the Tyndall effect? a The separation of a mixture b The scattering of light by colloidal particles in a colloid. c The freezing point of a solvent d The boiling point of a solution Feedback 4 Matter can be separated, but not all matter canbe separated physically 9 mixtures can be calssified as homogenous and heterogenous 13 please check the spelling 14 check your spelling 19 please check the spelling 21 please check the spelling
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