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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
(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?
(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)
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
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
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
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?
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
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
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.
Calculating the Potential of Solution, this makes me sick!!?
You are titrating 50.00mL of solution containing 0.100mol/L Co2+ with 0.100 mol/L Ce4+ titrant at 25 degree celcius. Eo Ce4+, Ce3+ = 1.44 V --------------------------- Eo Co3+, Co2+ = 0.855V
Calculate the potential of the solution after the addition of i) 25.00mL ii) 50.00mL iii) 75.00mL of the titrant Assume unit activity coefficients for all species.
a mix of HE, Ar, Xe has total pressure of 3.00atm. what is the pp for Xe if pp f
a mix of He,Ar,Xe has the total pressure 3.00 atm. partial pressure of He is 0.400 atm, partial pressure of Ar is 0.450 atm, what is the partial pressure for Xe?
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
Do all syndets render negative of precipitates when mixed with hard water?
If there is such cases (like mine) wherein syndets resulted to what look like precipitates or bubbles in tap water or in any of the following Ca, Mg or ferric chloride solutions, what does this indicate or mean? Thanks.
Propane, C3H8, is flammable and used in rural areas where natural gas is not ava
Propane, C3H8, is flammable and used in rural areas where natural gas is not available. What is the coefficient of oxygen in the balanced equation for the combustion of propane?
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?
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.
How would i go about doing q 4-7 Can someone tell me how to set up these equations and put a ? where i should plug in my lab results...attached pic with questions
2PbSO4 (aq) + 2H2O (I)
