Give the wavelengths of maximum absorption for each solution as shown in the spectra provided. Use the absorption wavelengths to explain why the [Ni(H2O)6] 2+ solution appears yellow-green but the [Co(H2O)6] 2+ solution appears pink.
[Ni(H2O)6] 2+ maximum absorbance at 720 nm
[Co(H2O)6] 2+ maximum absorbance at 510 nm
In: Chemistry
Nitrogen is slightly less dense than is a sample of air at the same temperature and pressure. Calculate the density of N2 in g/L, at 1.45 atm at 15 degree Celsius
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Propose a detailed sample preparation method for testing total sodium concentration in whole blood by Atomic emission
In: Chemistry
4a. For the following reaction, 3.96 grams of
carbon tetrachloride are mixed with excess
methane (CH4) . The reaction yields
3.67 grams of dichloromethane
(CH2Cl2) .
methane (CH4) ( g ) +
carbon tetrachloride ( g )
-------> dichloromethane
(CH2Cl2) ( g )
| What is the theoretical yield of dichloromethane (CH2Cl2) ? | _______ grams |
| What is the percent yield for this reaction ? | ________% |
4b. For the following reaction, 5.03 grams of
silver nitrate are mixed with excess
copper(II) chloride. The reaction yields
3.02 grams of silver
chloride.
silver nitrate (aq) +
copper(II) chloride (s)
----------> silver chloride
(s) + copper(II) nitrate
(aq)
| What is the theoretical yield of silver chloride ? | ________grams |
| What is the percent yield of silver chloride ? | _________% |
4c. For the following reaction, 5.80 grams of
silver nitrate are mixed with excess
copper. The reaction yields 2.56
grams of copper(II) nitrate.
silver nitrate (aq) +
copper (s) --------->
copper(II) nitrate (aq) +
silver (s)
| What is the theoretical yield of copper(II) nitrate ? | _______grams |
| What is the percent yield of copper(II) nitrate ? | _________ % |
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NH4NO3(s) <---> N2O (g) + 2H2O(g) K = 0.665 at 525K
If a 2L reaction vessel contains 0.65 moles of N2O (g), 1.2 moles of 2H2O (g) and 1.3 moles of NH4NO3 (s), which of the following statements are correct?
a. The amount of N2O (g) will increase and K will not change
b. The amount of N2O (g) will increase and K will get larger
Please explain!!!!!!!!!!!!!!!
If the volume of the container is decreased, where will the equilibrium shift?
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An unsaturated fat that is liquid at room temperature, such as olive oil can react in the presence of Pd/C without a hydrogen source to form a solid fat of the same formula. Explain what process besides hydrogenation could be taking place.
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3a. For the following reaction, 9.80 grams of carbon monoxide
are allowed to react with 10.1 grams of water.
carbon monoxide (g) + water (l) carbon dioxide (g) + hydrogen
(g)
What is the maximum amount of carbon dioxide that can be formed?
_____ grams
What is the FORMULA for the limiting reagent? _____
What amount of the excess reagent remains after the reaction is
complete? _____ grams
3b. For the following reaction, 8.18 grams of
nitrogen gas are allowed to react with
5.92 grams of oxygen gas.
nitrogen (g) +
oxygen (g) -------->
nitrogen monoxide (g)
What is the maximum amount of nitrogen monoxide
that can be formed? _____ grams
| What is the FORMULA for the limiting reagent? |
______ |
What amount of the excess reagent remains after the reaction is complete? _____ grams
3c. For the following reaction, 22.1 grams of
iron are allowed to react with
46.7 grams of chlorine gas.
iron (s) +
chlorine (g) ----->
iron(III) chloride (s)
What is the maximum amount of iron(III) chloride
that can be formed? _______ grams
| What is the FORMULA for the limiting reagent? | _____ |
What amount of the excess reagent remains after the reaction is complete? _______ grams
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50 mL of 0.060 M K2CrO4 is mixed with 50 mL of 0.080 M AgNO3. Calculate the following:
a. The solubility of Ag2CrO4 (Ksp = 1.9 X 10-12) in the solution in moles per liter.
b. The concentrations of the following ions Ag+, CrO4-2, K+, and NO3-.
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The mass of an iron bolt was 5.4 greater when it was manufactured. After being bolted to an outdoor structure for several months, the mass of the bolt was found to hae increased by 0.2 grams. Given the following balanced equation for the reaction, does the example support the law of conservation of mass? Why or why not?
4Fe +3O2--> 2Fe2O3
In: Chemistry
Draw the structure of four benzoic acid molecules and as many water molecules as you need to illustrate how the solid state of benzoic acid might look in cold water prior to recrystallization. In a second drawing illustrate what happens if the water is heated to near 100C, where benzoic acid is soluble. In each drawing identify, by name, specific examples of types of intermolecular interactions involved. Based on your drawings explain why benzoic acid is soluble in hot water and not soluble in cold water. Answer the question at the molecular level discussing the specific interactions involved in your drawings.
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Find the volume (mL) and the pH of 0.135 M HCl needed to reach the equivalence point(s) in titrations of the following. (You need to find the pH at the equivalence point, not the initial pH of the solution.
(a) 50.8 mL of 0.272 M NH3
(b) 11.8 mL of 1.76 M CH3NH2
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(1) What volume of 1-butanol is needed to convert 1.00 gram of benzhydrol to n-butyl benzydryl ether?
(2) Write the mechanism for the acid catalyzed condensation of ethyl alcohol to give diethyl ether. Note: make sure your mechanism has the following three steps (a) protonation (b) SN2 (not SN1) and finally (c) deprotonation.
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CalculatethepHofthesolutionformedbyadding25.10mL0.100MHNO3to15.00mL0.150 M KOH.
In: Chemistry
No. 5
A 1.00L bulb containing 0.233 Mol N2 and 0.341 mol PCl5 is heated up to 523K. The total pressure at equilibrium is 29.33 bar. Assuming that all gases are ideal, calculate Kp for the only reaction that occurs: PCl5(g)<--->PCl3(g) +Cl2(g) (Hint: Notice that the total number of moles at equilibrium is not the same as the initial number of moles)
In: Chemistry
In: Chemistry