Problem 10.33
Complete the following table for an ideal gas:
| P | V | n | T |
| 2.10 atm | 1.40 L | 0.480 mol | ? K |
| 0.320 atm | 0.250 L | ? mol | 22 ∘C |
| 670 torr | ? L | 0.333 mol | 360 K |
| ? atm | 595 mL | 0.260 mol | 295 K |
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Rank the following elements by electron affinity, from most positive to most negative EA value
Bi, Cl,Te,He,Na
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Predict whether or not a precipitate will form upon mixing 175.0 mL of a 0.0055 MKCl solution with 145.0 mL of a 0.0015 M AgNO3 solution. Identify the precipitate, if any. Express your answer as a chemical formula.
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Consider the reaction occurring at 25∘C.
A(s)+ B2+(aq)→ A
2+(aq)+ B(s) ΔGorxn=−11.0
kJ
Determine the value of E∘cell and K for the reaction and complete the table.
| [B2+] (M) | [A2+] (M) | Q | Ecell | ΔGrxn |
| 1.00 | 1.00 | |||
| 1.00 | 1.00×10−4 | |||
| 1.00×10−4 | 1.00 | |||
| 1.18×10−2 | 1.00 |
What is the value Ecell and K
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Sodium trioxalatocobaltate (III) trihydrate is
prepared by the following reactions:
[Co(H2O)6Cl2] + K2C2O4 *H2O >>> Co2O4 + 7 H2O
2CoC2O4 + H2O2 + 4 Na2C2O4 >>> 2 Na3[Co (C2O4)3*H2O + 2NaOH
what is the percent yield of Na3[Co (C2O4)3*H2O if 7.6 grams are obtained from 12.5 grams of [Co(H2O)6]Cl2 ? ( assume excess amount of the other reagents.)
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calculate E cell at 298 K (25 c) for Zn (s) + Cu 2+ (aq) --> Zn 2+ (aq) + Cu (s) when [Zn 2+]=.0010 M and [Cu 2+]=.10 M
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Determine the mg of aspirin in a commercial aspirin tablet labeled to contain 5 grains using the following data: 800.0 mg of pure aspirin was treated as the experiment called for and diluted to exactly 1000.0 mL. A reagent blank was prepared and set to read 0.00 absorbance. Exactly 10.00 and 5.00 mL of the standard aspirin solution were each treated with 10 mL of Fe 3+ solution, diluted to exactly 100.0 mL and found to have absorbances of 0.837 and 0.410 respectively. A 374.5 mg commercial aspirin tablet was treated as the experiment called for and diluted to exactly 500.0 mL. Exactly 10.00 and 5.00 mL of the sample solution were each treated with 10 mL of Fe 3+ solution, diluted to exactly 100.0 mL and found to have absorbances of 0.694 and 0.336 respectively. Comment
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Terephthalic acid is an important chemical used in the manufacture of polyesters and plasticizers. It contains only C, H, and O. Combustion of 20.40 mg terephthalic acid produces 43.23 mg CO2 and 6.64 mg H2O. If 0.271 mole of terephthalic acid has a mass of 45.0 g, determine the molecular formula for terephthalic acid
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what preliminary test results are you looking for to identify conclusively your unknown solutions as this set : AgNO3(aq), Ba(NO)3(aq), HCl(aq), H2SO4(aq), NaOH(aq) ?
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The compound K2SO4 has solubility of 15 grams in 100mL of water. How many milliliters of water are required to dissolve 53 grams of K2SO4?
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referring to the reaction in Question #2, 38.4 ml of a 0.150 M KMnO4 solution is required to titrate 25.2 mL of a sodium oxalate. What is the concentration ofoxalate ion in the solution ?
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Bismuth-210 is beta emitter with a half-life of 5.0 days. Part A If a sample contains 1.2 g of Bi−210 (atomic mass = 209.984105 amu), how many beta emissions would occur in 14.0 days? Part B If a person's body intercepts 5.8% of those emissions, to what dose of radiation (in Ci) is the person exposed?
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Thermodynamics:
What is the significance of:
a reduced pressure and reduced temperature of 1, and;
a compressibility factor (Z) of 1?
At room temperature, what pressure is needed in order to say that nitrogen is non-ideal if you define non-ideal as 5% error from the ideal gas law?
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At 25.00 ºC the vapor pressure of pure hexane is 151.2 torr, and that of pure heptane is 45.6 torr. What is the mole fraction of hexane in the gas phase above a solution containing 3.000 moles of hexane and 2.000 moles of heptane at 25.00 ºC?
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