Consider the basecatalyzedreaction OCl (aq) + I (aq) → OH (aq) + Cl (aq) Determine the rate law and the rate constant, using the following initial rate data. (Hint: basecatalyzedindicates that OH affects the rate despite appearing as a product.)
| [OCl-] | 1.62e-3 | 1.62e-3 | .00271 | .00162 |
| [I-] | 1.62e-3 | 2.88e-3 | .00162 | .0028 |
| [OH-] | .52 | .52 | .84 | .91 |
| initil rate m/s | .000306 | .00054 | .000316 | .000311 |
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How do I calculate the theoretical yield of the product in grams and mol?
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Predict the effect of the following changes on the reaction in which SO3 decomposes to form SO2 and O2. 2 SO3(g) 2 SO2 (g) + O2 (g) Ho = 197.78 kJ
(a) Increasing the temperature of the reaction.
(b) Increasing the pressure on the reaction.
(c) Adding more O2 when the reaction is at equilibrium.
(d) Removing O2 from the system when the reaction is at equilibrium.
(e) Adding N2 gas to the reaction mixture
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4. How do you decide whether to use enough hot water to dissolve acetanilide or enough to dissolve phenacetin?
5. If someone mixed sand into your unknown sample so you could not separate the grains of sand from the unknown solid, how could you separate them? Would the same action work if sucrose was mixed into your unknown?
6. Why would you allow the filtered liquid to cool slowly? What would happen if you did not allow slow cooling?
7. Why and when would you put the recrystallizing solution in an ice bath?
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A 25.0 mL sample of 0.100 HClO4 is titrated with a 0.100 M NaOH solution. What is the pH after the addition of 10.0 mL of NaOH? (HClO4 is a strong acid)
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200.0 mL of 1.5 x 10^-3 M Cu(NO3)2 is
mixed with 250.0 mL of 0.20 M NH3. The overall formation constant
for the formation of the [Cu(NH3)4]2+ complex
is 1.7·1013. (8 points)
a) What is the [Cu2+] at equilibrium?
b) Does CuS precipitate with a concentrated H2S out of this
solution at pH=6? The Ksp for CuS is 8·10-37.
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Give examples from the literature of metal complexes with coordination numbers (CN) of 2, 3, 4, 5, 6, 7 and 8 (formula, structure). What is the highest Coordination Number found for a metal ion?
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Given the following data:
3FeO(s) + CO2(g) → Fe3O4(s) + CO(g) ΔH° = -18.0 kJ
FeO(s) + CO(g) → Fe(s) + CO2(g) ΔH° = -11.0 kJ
Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g) ΔH° = -23.0 kJ
Calculate ΔH° for the reaction: 3Fe2O3(s) + CO(g) → 2Fe3O4(s) + CO2(g)
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What would be the effect of each of the following sources of error in the reaction between Mg and HCl? Would they result in a high, low, or unaffected value for the heat of reaction? Why?
A. The calorimeter absorbs heat.
B. The thermometer reads 2 °C low at all temperatures.
C. The actual molarity of the HCl is slightly higher than reported
on the bottle.
D. The mass of the filter paper was not subtracted in the determination of ∆H1.
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What is the osmotic pressure, in torr, of a 3.00% solution of
NaCl in water when the temperature of the solution is 45 ºC? Enter
your answer scientific notation.
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Recalculate the percent dissociation of 0.19M HN3 in the presence of 0.19M HCl.
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A 150.0 mL gas tank contains 51.2 g of oxygen gas and 32.6 g helium gas. What is the total pressure in the tank? What is the partial pressure of oxygen?
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Which statement about the following redox reaction in acidic
solution is not correct?
MnO4??(aq) +
I???(aq) ? MnO2(s) +
I2(aq)
| A) H2O and H?+ can be used to balance the oxygen atoms, if necessary, in each of the half-reactions. | |
| B) MnO4??(aq) ? MnO2(s) is the reduction step. | |
| C) I???(aq) ? I2(aq) is the oxidation step. | |
| D) The redox atoms are already balanced in this reaction. |
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The energy from condensing water vapor is used to melt ice at 0oC. What mass (kg) of ice can be melted by condensing 0.500 kg of water vapor? (ΔHfus = 6.01 kJ/mol and ΔHvap = 40.7 kJ/mol)
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) The standard enthalpies of formation of SO2 and SO3 are ?297 and ?396 kJ/mol respectively. Calculate the standard enthalpy of reaction for the reaction: SO2(g) + 1/2O2(g)??SO3 (g)
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