Find the pH of each of the following mixtures of acids.
1.5×10−2 molL−1 in HBr and 1.0×10−2 molL−1 in HClO4
8.5×10−2 molL−1 in HF and 0.220 molL−1 in C6H5OH
0.110 molL−1 in formic acid and 5.5×10−2 molL−1 in hypochlorous acid
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what is the relative activity and the degree of inhibition caused by a competitive inhibitor when [S]=km and [I]= ki?
please show the work
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A 25.0 mL sample containing Ni2+ was analyzed and gave an instrument siganl of 23.6 units (corrected for a blank). When exactly 0.500 mL of 0.0287 Ni(NO3)2 was added to the solution, the signal increased to 37.9 units. Calculate the molar concentration of Ni2+ assuming that the signal was directly proportional to the analyte concentration.
I was told this was a single addition standard addition problem, but I'm not sure how to work it. Thanks!
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A 10.0 mL solution of 0.064 M AgNO3 was titrated with 0.032 M NaBr in the cell.
S.C.E. || titration solution | Ag(s)
Find the cell voltage for 0.5, 14.0, 20.0, and 32.0 mL of titrant. (The Ksp of AgBr = 5.0 ✕ 10−13.)
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21) Phosphorus pentachloride decomposes according to the chemical equation. A 0.237 mol sample of PCl5(g) is injected into an empty 3.70 L reaction vessel held at 250
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if you begin with 3.46 g of Fe, what mass in grams of O2 is required for complete reaction?
what is the theoretical yield of FeO3 in grams?
if 4.83 g of Fe2O3 are actually obtains, wht is the percent yield?
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1. If the outside flask is not dried after vaporizing the liquid, will the unknown's calculated molecular weight be too high or too low? EXPLAIN.
A. Assume the atmospheric pressue is 1 atm but the actual pressue is higher than 1 atm. How will this error affect the calculated molar mass of the unknown? EXPLAIN.
B. If the vapor'svolume were to be incorrectly recorded as 125ml, how will this error affect the calculated molarmass of the unknown? EXPLAIN.
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At a certain temperature, K for the reaction below is 7.5 L/mol.
2NO2(g) → N2O4(g)
If 2.0 moles of NO2 are placed in a 2.0 liter container and permitted to react at this temperature, what will be the concentration of N2O4 at equilibrium?
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Explain why absorption spectra for atomic species consist of discrete lines at specific wavelengths rather than broad bands for molecular species.
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1713
A 35.0-mL sample of 0.150 M acetic acid (CH3COOH) is titrated with 0.150M NaOH solution. Calculate the pH after the following volumes of base have been added.
a) 0 mL
b) 17.5 mL
c) 34.5 mL
d) 35.0 mL
e) 35.5 mL
f) 50.0 mL
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Equal volumes of 0.210 M weak base (Kb = 5.0× 10–9) and 0.210 M HCl are mixed. Calculate the pH of the resulting solution.
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What are some problems associated with determining the dose of airborne nanomaterials in a worker’s breathing zone?
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Obtain expressions for dU, dH, dA, and dG for an ideal gas and for a van der Waals gas.
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A researcher attempted this reaction with H2SO4 instead of H3PO4 and noticed a 3rd product. How did this product form from just switching the acid catalyst?
the E1 reaction for the lab:
2-methylcyclohexanol with H3PO4 to make 2-methycyclohexane product. The H3PO4 solution will instead be H2SO4.
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