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One ecologically important equilibrium is that between carbonate and hydrogencarbonate (bicarbonate) ions in natural water. (a) Th e standard Gibbs energies of formation of CO3 2?(aq) and HCO3?(aq) are ?527.81 kJ mol?1 and ?586.77 kJ mol?1, respectively. What is the standard potential of the HCO3?/CO32?,H2 couple? (b) Calculate the standard potential of a cell in which the cell reaction is Na2CO3(aq) + H2O(l) ? NaHCO3(aq) + NaOH(aq). (c) Write the Nernst equation for the cell, (d) Predict and calculate the change in potential when the pH is changed to 7.0. (e) Calculate the value of pKa for HCO3?(aq).
calculate Kc for the reaction below: 2P(g)+ 5Cl2(g) 2PCl5(g) The answer provided is 240. Why is that?
Ammonium Carbonate, NH4CO2, decomposes as follows: NH4CO2NH2(s) -> 2NH3(g) + CO2(g) Starting with only the solid, it is found that at 40C the total gas pressure is .363 atm. Calculate Kp.
What mass of ethanol, C2H5OH a nonelectrolyte, must be added to 10.0 L of water to give a solution that freezes at -10.0C? Assume the density of water is 1.0 g/mL. Kf of water is 1.86C/m.
The magnesium and calcium ions present in seawater([Mg2+] = 0.059 M and [Ca2+] = 0.011 M) can be separated by selective precipitation with KOH.
What mass of F2 is needed to produce 167 g of PF3 if the reaction has a 77.0% yield?
sodium-24 is a radioistope with half life of 15 hours. A sample of pure sodium-24 has an inital mass of 400.0 g. what mass of sodium-24 remains after 60 hours?
The bottle is brought outside and stored at 0.0°C. (See Table 5.2) (a) What mass of water condenses inside the bottle? _______g (b) Would water condense at 10 degrees C?
The density of H2O2 is 1.463g/ml and the density of O2 is 1.428 g/l. How many liters of O2 will from 55.0mL of H2O2?
if 2.29 moles of argon gas are added to 3.5L of a 6.58 mole sample of argon gas what is the final volume
The enthalpy of fusion of methanol (CH3OH) is 3.16 kJ/mol. How much heat would be absorbed or released upon freezing 25.6 grams of methanol?
Given the balanced equation: C2H4 + 3O2 → 2CO2 + 2H2O How many liters of CO2 are produced when 15 liters of O2 are consumed?
The titration of 0.7910 grams of an unknown weak acid requires 41.5 mL of 0.139 M NaOH in order to reach the equivalence point.
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