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Compute the pH of a buffer solution prepared by dissolving 4.2 g of NaHCO3 and 5.3 g of Na2CO3 in 0.20 L of water. Explain will the pH of the solution change if the volume is increased by a factor of 10? Explain.
Stearic acid, nature's most common fatty acid, dimerizes when dissolved in hexane. The equilibrium constant for this reaction at 28 degrees Celsius is 2,900. Estimate the equilibrium constant at 38 degrees C.
A solution is initially supersaturated with Ca2+ and CO32- ions by rapid addition of calcium carbonate, such that the concentrations of each are 2.10x10-3M. The water's pH is held at 8.5. When equilibrium is finally reached, determine:
A volume of 30.7 mL of a 1.66 M KMnO4 solution is mixed with 16.7 mL of a 0.976 M KMnO4 solution. Calculate the concentration of the final solution.
Consider the following thermochemical equations : 8Mg(s) + Mg(NO3)2(s) ? Mg3N2(s) + 6MgO(s) ?H°rxn = -3884 kJ Mg3N2(s) ? 3Mg(s) + N2(g) ?H°rxn = +463 kJ 2MgO(s) ? 2Mg(s) + O2(g) ?H°rxn = +1203 kJ Use the above equations to calculate the ?H°f (in k..
What is the net redox reaction that occurs when Cu comes into contact with acidic K2Cr2O7? (b) What is the E cell for the reaction
A dilute solution containing 5 ppm of solute has a density of 1.00 g/ml. Express the concentration of the solute in g/L, ug/mL and mg/L.
density of gold is 19.31 gcm3density of platinum is 21.43 gcm3if equal masses of gold and platinum are transferred to
What are the commonalities/general concepts/theme of metabolism. Please give as many as you can and specifics. For example, "regulation" which includes allosteric, feed forward, feed backward
Write a suitable mechanism for the cleavage of butyl isopropyl ether with HI at 100 degrees C to form exclusively isopropyl alcohol and 1-iodobutane. Explain why butyl alcohol and 2-iodo-isopropane are not formed in this reaction.
Find the pH and volume (mL) of 0.477 M HNO3 needed to reach the equivalence point(s) in the titration of 2.65 L of .0750 M pyrimidine (C5N5N).
Calcium carbonate decomposes with heat to give calcium oxide and carbon dioxide gas. If 2 mols of CaCO3 decompose, how many Liters of CO2 gas are produced at 1 atm and 0 degrees Celsius
For the cell as written, what is the voltage after the addition of the following volume of NaI solution? The reduction potential for the saturated calomel electrode is E = 0.241 V. The standard reduction potential for the reaction
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