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Determine the pH of a solution by constructing a BCA table, constructing an ICE table, writing the equilibrium constant expression, and using this information to determine the pH. The value of Kb for CH NH is 4.4 x 104. Complete Parts 1-4 before submi
A typical automobile engine uses a lead-acid battery. During discharge, the following chemical reaction takes place: Pb (s) + PbO2 (s) + 2H2SO4 2PbSO4 (aq) + 2H2O (I) Determine the enthalpy change of this reaction, given the following equations:
1) Pb (s) + PbO2 (s) + 2SO3 (g) 2PbSO4 (s) ΔH°= -775 kJ
(b) When inspecting the structures of the metal-metal bonded complex ions [Mo2Cl8]4-, [Re2Cl8]2-, and [Os2Cl8]2-, it is observed that the chlorido ligands on the metal centres have an eclipsed arrangement in [Mo2Cl8]4- and [Re2Cl8]2-, but they are staggered in [Os2Cl8]2-. (i) Draw a molecular orbital energy level diagram (obtained by overlap of the appropriate d-orbitals)
(a) A chemist is given three bottles, each containing a pure sample of one of the three complexes, Na3[Co(CN)6], Na3[-Fe(C2O4)3] or Na3[CoF6] (C2O4 represents the bidentate, dianionic oxalato ligand). However, the bottles are not labelled and the chemist is asked to quickly determine which bottle contains which complex by carrying out for each sample measurements involving: (
Fluorescence Spectroscopy (i) Fluorescence resonance energy transfer (FRET) is widely used in biology as a molecular ruler (i.e. to estimate distances between two fluorescent molecules). A FRET donor-acceptor pair had a Förster distance of 7.2 nm. If the efficiency of energy transfer between the donor and acceptor was 10%, what is the distance between the donor and acceptor?
according to Fagan's method titrate 30m1 of the mixed halides solution (K1 +NaCI) with standard 0.1M AgNO3 using flourescein indicator, then titrate another 30m1 of the original solution (KI +NaC1) with the same titrant using eosin indicator then Calculate the concentration of each halide in the mix. In g% knowing that (V end point for flask 1(using fluorescein) =70m1 and
according to neutralization capacity of antiacid add to conical flask 10 ml of the standard 0.5M HCL, then Stopper the flask and let it stand at room temperature for 10 min.-Add 5-6 drops bromophenol blue then titrate with standerdization 0.1NaOH -Calculate the (volume of HCl reacted with antacid)(Vr) knowing that Volume of the end point (volume o
Of a known amount of powdered aspirin tablets, take a weight that is equivalent to 600mg aspirin add 40m1 0.5M NaOH, heat for 15 minutes, titrate the excess of alkali with standardized 0.5M HCl using phenol red solution as indicator. Calculate the percentage label claim. . knowing that Volume of the end point (volume of HC1)=30m1 Mwt of aspi
Calculate the molar enthalpy change of neutralisation of potassium carbonate. Assume that all ...
When 2.76g of potassium carbonate were added to 30.0cm^3 of 2.0mol/dm^3 hydrochloric acid, the temperature rose to 5.2°C. Write the equation for this reaction. Calculate the molar enthalpy change of neutralisation of potassium carbonate. Assume that all solutions have a density of 1.0g/cm^3
Design a dilution scheme to achieve the following aims. Make sure to draw the dilution scheme, include the volume of dilution blanks used, volumes transferred, and the fold dilution that corresponds to the volume transferred.
4. In order to be able to decipher protein structure on StructureSupraX2000, the protein concentration has to be in the range of 0.1-0.2 nM. Y
These are questions for a pre-lab and I do not understand how to do these at all. I talked to the teacher and he only gave me the definitions and told me to think about what it is asking for. Thanks for the help!!!
1. Ozone absorbs ultraviolet light in the upper atmosphere thus protecting us from sunburn. Down at ground level however, ozone is a pollutant whic
Which of the statements listed below is true regarding the following redox reaction occurring in a ...
Which of the statements listed below is true regarding the following redox reaction occurring in a spontaneous electrochemical cell? Sn(s) + Cu2+(aq) → Cu(s) + Sn2+(aq) Question 40 options:
Sn is oxidized at the cathode.
Anions in the salt bridge flow from the Sn half-cell to the Cu half-cell.
If you have ever been to a public pool, you know that you are required to exit the pool when there is lightning in the sky. But consider your results from part (a) above and what you learned in this lab, paying particular attention to the very first demonstration that the instructor shows you regarding the light bulb. Does this protocol make sense in light of the data from this demo
What is the name of the reagent in this orgo chem problem? ( picture attached)
Hello,
I've been trying to understand why this happens and how, but I've never seen this before. Also, it's hard to read the reagent. Does anyone know what it says and how the ring closes?
So this is actually a question in my biology class but it is a question about enantiomers so I figured I'd put it in Chemistry. Anyway! So the answer is A being that A is NOT an enantiomer. I'm not understanding why it's not if D is the same thing just with CH3 instead of a H. Any help is appreciated.
Having trouble on excel graphing the distillations
Hello if anyone could guide me or show me how they graph this on excel that would be great. I don't see the bins or ranges option in the excel 2011 version.
I am trying to graph a fractional and simple fractional distillation. With temperature on the x axis and volume in ml on the y. I don't know how to do the ranges in the x axis. Separation of unk
Using Hess's Law and any necessary information from your Data Booklet, calculate
combustion of ethene Using Hess's Law and any necessary information from your Data Booklet, calculate the molar enthalpy of reaction for the combustion of ethene in kJ/mol. C2H4+ 3O2 ---> 2CO2 + 2H2O
The concentration of hydronium ions, i.e. (H3O+), in a solution is measured
The concentration of hydronium ions, i.e. (H3O+), in a solution is measured to be 8.6x10^-9 mol/L. What is the pH of the solution? Is this solution an acid or a base?
How does the rate of an E2 Elimination reaction affected by the ff. conditions?
Conditions: 1. Reactant Structure: bromocyclohexane, chlorocyclohexane, iodocyclohexane 2. Base Strengths: 1.0 mL sodium ethoxide diluted with 1.0 mL ethanol as opposed to the original which is 2.0 mL sodium ethoxide 3. Temperature: reflux vs room temperature. *Please provide specific explanations (even a 3 year old will understand) on how each factors affect the
1. What is the product of the original reaction as shown? 2. If Br is replaced with Cl, what would be the product? 3. If Br is replaced with I, what would be the product? (Three total answers)
A polar covalent bond is a bond between two non-metals with different electronegativities. Only bonds between the same elements are truly nonpolar. The higher the difference in electronegativity, the more polar the bond is. Take a look at this table of electronegavities and let's try some examples.
One of the boundary conditions for Particle in a Box is that the box's walls hav
One of the boundary conditions for Particle in a Box is that the box's walls have ___________ potential energy, and a result the particle has __________ probability of being found at the walls.
Consider the solution to the Schrodinger equation involving a single particle in
Consider the solution to the Schrodinger equation involving a single particle in a one-dimensional box. If all other variables were unchanged, decreasing the length (L) of the box from 400 nm to 200 nm would _________ the energy (E) of the particle. If all other variables were the same, a particle of mass 3 x 10-24 kg would have ___________ energy as a particle of mass 6
The Schrödinger equation yields an infinite number of solutions for the possible
The Schrödinger equation yields an infinite number of solutions for the possible location of an electron in a hydrogen atom. Each of these solutions has a(n) _______ and a(n) __________ . The solutions from the Schrödinger equation are labeled by ___________ .
2PbSO4 (aq) + 2H2O (I)
