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| 1 |
Which one of the following acids has a name starting with hydro- and ending in -ic? |
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H2O |
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HF |
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HNO3 |
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HClO4 |
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| 2 |
A student doing an experiment in the lab accidentally added excess water to his aqueous test solution. The result of this was |
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the mass of solute decreased |
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the concentration of the solution increased |
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the concentration of the solution decreased |
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the number of moles of solute increased |
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| 3 |
Aqueous hydrogen ion, in solution, may be detected by |
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a bitter taste |
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a soapy texture |
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reaction with magnesium ribbon |
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litmus paper turns blue |
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| 4 |
The mass of tin(II) fluoride found in 100 mL of a toothpaste that contains this
cavity-preventing ingredient in a concentration of 5.21 x 10-6 mol/L is |
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8.16 x 10-5 g |
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3.18 x 10-5 g |
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7.19 x 10-4 g |
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5.21 x 10-7g |
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| 5 |
Use the following information to answer this question.
I dissolve solute in about 50 mL of water
II dissolve solute in 100.0 mL of water
III dilute solution to 100.0 mL
IV transfer solute to a volumetric flask
V transfer solution to a volumetric flask
VI mix thoroughly
A student obtains, in a beaker, the correct mass of solute needed to make 100.0 mL of solution. The best steps, in the correct order, to complete the preparation
of the solution are |
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I, V, III, VI |
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II, V, III, VI |
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I, VI, IV, III |
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IV, III, VI |
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| 6 |
What is the percentage of solute by mass in a solution prepared by dissolving 50 g of KNO3 in 200 g of water? |
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50% |
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25% |
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80% |
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20% |
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| 7 |
The volume of 0.300 mol/L CH3COOH solution that can be prepared from 100 mL of glacial acetic acid (17.4 mol/L) is |
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0.515 L |
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2.85 L |
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5.80 L |
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1.74 L |
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| 8 |
The volume of 0.100 mol/L HCl which must be diluted with water to produce 1.0 L of 0.010 mol/L HCl is |
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300 mL |
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200 mL |
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100 mL |
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400 mL |
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| 9 |
Concentrated hydrochloric acid has a concentration of 12.4 mol/L. If a person requires 25.0 L of 4.20 mol/L acid to etch a cement floor, the volume of the concentrated acid that would be required for dilution is |
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105 L |
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2.08 L |
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73.8 L |
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8.47 L |
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| 10 |
How many moles of ions are produced by the dissociation of one mole of Ca(OH)2(s)? |
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4 |
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3 |
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2 |
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1 |
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| 11 |
Which equation shows the dissociation of Lithium Sulphate? |
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LiSO4 --------> Li+2(aq) + SO42-(aq) |
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Li2SO4 -------> 2Li+(aq) + SO42-(aq) |
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LiSO4 -------> Li2+(aq) + S2-(aq) + 4O2-(aq) |
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Li2SO4 -------> 2Li+(aq) + S2-(aq) + 4O2-(aq) |
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