Name: Period: Date: solution

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1 Name: Period: Date: ID: A Solutions Test A Matching Use the choices below to answer the following 5 questions. a. Hydrogen bond d. Electrolyte b. Polar molecule e. Nonelectrolyte c. Nonpolar molecule 1. A substance which forms ions in aqueous s and conducts electricity 2. The bond occuring between a hydrogen and the negatively charged end of another molecule 3. A substance that does not dissolve to form ions in an aqueous nor conduct electricity 4. Molecule in which there is a partial negative charge on one end and a partial positive charge on the other end 5. A molecule which has no separation of charge, so no positive or negative poles are formed Multiple Choice Identify the choice that best completes the statement or answers the question. 6. If 2.0 ml of 6.0M HCl is used to make a ml aqueous, what is the molarity of the dilute? a M c. 2.4 M b. 24 M d M 7. If you were making a 2.00 M of sulfuric acid and you added 250. ml of 18.0 M sulfuric acid, how many liters of the were produced? a L c. 2.5 L b. 22 L d L 8. Which is the most concentrated? a. 1 moles of solute dissolved in 1 liters of b. 6 moles of solute dissolved in 4 liters of c. 2 moles of solute dissolved in 3 liters of d. 4 moles of solute dissolved in 8 liters of 9. What is the molarity of a that contains 0.50 mole of NaOH in 0.50 liter of? a M c M b. 2.0 M d. 1.0 M 10. The laboratory procedure for preparing a 3M of sodium acetate includes a step that requires stirring the solvent while adding the measured amount of sodium acetate. What is the best explanation for this procedural step? a. A chemical reaction requires mixing and stirring c. It breaks the bonds of the solvent molecules. b. The solubility of the solute is increased. d. The amount of contact between the solvent and solute is increased. 1

2 11. In a concentrated there is a. a large amount of solute per unit solvent c. a small amount of solute per unit solvent b. no solvent d. no solute 12. Polar substances will dissolve a. only in polar stubstances c. only in non-polar substances b. in both polar and nonpolar substances d. none of the above 13. Which has a higher solubility? a. A non-gaseous at 50ºC b. The same non-gaseous at 100ºC 14. Solubility data for four different salts in water at 60ºC are shown in the table below. Salt Solubility in Water at 60ºC A B C D 10 grams / 50 grams water 20 grams / 50 grams water 30 grams / 50 grams water 40 grams / 50 grams water Which salt is most soluble at 60ºC? a. A c. C b. B d. D 15. A homogeneous substance in which one substance is dissolved in another is called a a. Element c. Heterogeneous Mixture b. Compound d. Solution 16. Which dissolves slower? a. Granulated sugar b. A cube of sugar 17. An aqueous (aq) and a liquid (l) are two different types of matter because: a. A liquid is not a mixture and an aqueous c. A liquid is a heterogeneous mixture is a heterogeneous mixture. b. A liquid is a pure substance and an d. There is no difference; they are the same. aqueous is a where the solvent is water. 18. What would you classify a tea and sugar if you added more sugar and the sugar STILL dissolves? a. supersaturated c. hyposaturated b. saturated d. unsaturated 19. In the picture below, what is being dissolved in water? a. An ionic compound c. An acid b. A covalent compound d. None of the above 2

3 20. Which has a higher solubility? a. A gaseous at 5 atm b. The same gaseous at 3 atm 21. Bronze alloy is made of over 50% copper and less than 50% zinc. Zinc is the: a. Mixture c. Element b. Solvent d. Solute Use the solubility curves below for the following 3 questions. 22. When the temperature is decreased from 40ºC to 20ºC the solubility of: a. NH 3 increases and the solubility of NaNO 3 c. NH 3 increases and the solubility of NaNO 3 increases increases b. NH 3 decreases and the solubility of NaNO 3 increases d. NH 3 increases and the solubility of NaNO 3 decreases 23. A student was provided an unknown solid and was asked to determine its identity. The student tested the solubility of the solid at several different temperatures as provided in the table below. a. potassium chlorate, KClO 3 c. potassium nitrate, KNO 3 b. ammonium chloride, NH 4Cl d. sodium chloride, NaCl 3

4 24. Which of the following statements is most supported by the graph above? a. The solubility of KClO 3 is greater than that of NaCl at all pressures b. The solubility of NH 3 is greater than that of NaCl at all temperatures c. NaNO 3 is more soluble in water than KClO 3 or NaCl at all temperatures d. Increasing temperature increases the solubility of NaCl more drastically than the other salts shown 25. The bonds between the hydrogen and oxygen atoms within one water molecule are a. polar covalent bonds c. ionic bonds b. nonpolar covalent bonds d. hydrogen bonds 26. Oil and water do not dissolve because: a. Water weighs less than oil c. Water is polar and oil is nonpolar b. Water is nonpolar and oil is polar d. Water and oil are both polar 27. Trial Solute Added in Grams (g) Amount of Solute Undissolved in Grams (g) The data table above shows the results of adding different amounts of solute to equal amounts of water. Which statement is best supported by these data? a. A quantity of 10 to 20 grams of solute dissolves more easily in cold water than in warm water. c. The temperature of the water increases when 30 grams of solute is added. b. The 50 grams of solute dissolved the most. d. Some solute remains undissolved when more than 40 grams of solute is added. 28. A three dimensional diagram of water appears below. The best explanation for the ability of water to dissolve many different substances is a. it is found covering 70% of the earth s c. the polarity as shown in the diagram surface above b. the ratio of two hydrogen atoms bonded to d. the symmetrical shape of the structure one oxygen atom 4

5 29. Which dissolves slower? a. A non-agitated b. An agitated 30. When iodine is dissolved in alcohol, the alcohol is the a. alloy c. solvent b. mixture d. solute 31. What is the molarity of a of KNO3 (molecular mass = 101) that contains 404 grams of KNO3 in 2.00 liters of? a M c M b M d M 32. Identify the solvent in this diagram a. A c. C b. B d. D 33. A crushed antacid tablet would dissolve faster than a whole tablet in water because: a. the surface area is greater for the whole c. the surface area is greater for the crushed tablet tablet b. the molecules of the crushed tablet are d. the molecules of water are moving faster moving faster 5

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