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19 Cards in this Set
- Front
- Back
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The process of solute particles being surrounded by solvent particles is known as______.
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Solvation
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Pairs of liquids that will mix in all proportions are called _____ liquids
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Miscible
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The mole fraction of He in a gaseous solution prepared from 4.0 g of He, 6.5 g of Ar, and 10.0 g of Ne is ___________
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.60
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The morality of urea in a solution prepared by dissolving 16g of urea (MW=60.0 g/mol) in 39 g of H2O is _________M. The density of the solution is 1.3 g/mL.
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6.3
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A solution containing 10.0 g of an unknown liquid and 90.0 g water has a freezing point of -3.33°C. Given for water, the molar mass of the unknown liquid is
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62.2
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A saturated solution________
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contains dissolved solute in equilibrium with undissolved solute.
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An unsaturated solution is one that __________.
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has a concentration lower than the solubility
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Pressure has an appreciable effect on the solubility of __________ in liquids.
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gases
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A solution contains 28% phosphoric acid by mass. This means that __________.
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100 g of this solution contains 28 g of phosphoric acid
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A solution is prepared by dissolving calcium chloride in water and diluting to 500 mL If this solution contains 44 ppm chloride ions, the concentration of calcium ions is __________ ppm.
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22
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As the concentration of a solute in a solution increases, the freezing point of the solution __________ and the vapor pressure of the solution __________.
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decreases, decreases
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Calculate the vapor pressure of a solution made by dissolving 109 grams of glucose (molar mass = 180.2 g/mol) in 920.0 ml of water at 25°C. The vapor pressure of pure water at 25°C is 23.76 mm Hg. Assume the density of the solution is 1.00 g/ml.
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23.48 mm Hg
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Adding a nonvolatile solute to a solution decreases the vapor pressure of the solution. (T/F)
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True
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The osmotic pressure of a solution formed by dissolving 25.0 mg of aspirin (C9H8O4) in 0.250 L of water at 25°C is __________ atm.
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.0136
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Consider the following reaction:
3A -> 2B The average rate of appearance of B is given by Δ[B]/ Δt. Comparing the rate of appearance of B and the rate of disappearance of A, we get Δ[B]/ Δt=_____x (-Δ[A]/Δt). |
2/3
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If the rate law for the reaction:
2A + 3B -> products is first order in A and second order in B, then the rate law is |
Rate law is equal to k[A][B]2
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The kinetics of the reaction below were studied and it was determined that the reaction rate increased by a factor of 9 when the concentration of B was tripled. The reaction is __________ order in B.
A+B ->P |
second
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The rate of disappearance of HBr in the gas phase reaction:
2HBR (g)-> H2 (g)+ Br2 (g) is 0.301 M s-1 at 150°C. The rate of appearance of Br2 is __________ M s-1. |
.151
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The decomposition of N2O5 in solution in carbon tetrachloride proceeds via the reaction
2N2O5 (soln) -> 4NO2 (soln) +O2 (soln) The reaction is first order and has a rate constant of 4.82 x 10-3 s-1 at 64°C. If the reaction is initiated with 0.058 mol in a 1.00-L vessel, how many moles remain after 151 s? |
.028
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