Question :
41.Characterize EACH of the three given statements as being TRUE : 1309614
41.Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices.
(1) A solution of concentration 7.6 %(m/m) contains 7.6 grams of solute per 1 liter of solution.
(2) The use of antifreeze in car radiators in the winter and the use of rock salt in making homemade ice cream are based on the same chemical principle.
(3) One mole of any molecular solute raises the boiling point of one kilogram of water by 1.86oC..
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
42.Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices.
(1) Addition of 40.0 mL of water to 10.0 mL of 8.0 M NaOH would produce a 2.0 M NaOH solution.
(2) Henry’s law is a pressure-solubility relationship for gases in liquids.
(3) Boiling points are the basis for the solubility rule “like dissolves like.”
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
43.Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices.
(1) The osmolarity of a 3.0 M NaCl solution is greater than the osmolarity of a 2.0 M Na2SO4 solution.
(2) A solution with just two components must always be a liquid.
(3) Red blood cells will shrink in size when placed in an isotonic solution.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
44.Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices.
(1) 2.0 liters of a 6.0 M solution would contain 12.0 moles of solute, independent of the identity of the solute.
(2) For liquid-liquid solutions, volume of the solution is always greater than the sum of the volumes of solute and solvent because of solute-solvent repulsion effects.
(3) Osmotic pressure is the amount of pressure needed to prevent the process of osmosis from occurring.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
45.Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices.
(1) Fat-soluble vitamins have polar molecular structures.
(2) Increased temperature decreases gas solubility, and increased pressure increases gas solubility.
(3) The mechanism for controlled-release medications involves encapsulation with particle coatings of varying thickness.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
46.For the set of ionic compounds, NaNO3, KNO3, NH4NO3, choose the correct characterization of their solubilities in water from the response list.
a.All three salts are soluble.
b.Two of the three salts are soluble.
c.One of the three salts is soluble.
d.None of the three salts are soluble.
47.For the set of ionic compounds, LiCl, AgCl, MgCl2, choose the correct characterization of their solubilities in water from the response list.
a.All three salts are soluble.
b.Two of the three salts are soluble.
c.One of the three salts is soluble.
d.None of the three salts are soluble.
48.For the set of ionic compounds, BaSO4, BaCO3, Ba(OH)2, choose the correct characterization of their solubilities in water from the response list.
a.All three salts are soluble.
b.Two of the three salts are soluble.
c.One of the three salts is soluble.
d.None of the three salts are soluble.
49.For the set of ionic compounds, CaSO4, CaBr2, CaCO3, choose the correct characterization of their solubilities in water from the response list.
a.All three salts are soluble.
b.Two of the three salts are soluble.
c.One of the three salts is soluble.
d.None of the three salts are soluble.
50.For the set of ionic compounds, AlPO4, Al(OH)3, Al(NO3)3, choose the correct characterization of their solubilities in water from the response list.
a.All three salts are soluble.
b.Two of the three salts are soluble.
c.One of the three salts is soluble.
d.None of the three salts are soluble.
