3. 4. 6. 8. 6. 10 11 12 13 Write a balanced half-reaction for the reduction of gaseous oxygen (O,) to liquid water (H,0) in acidic aqueous solution. Be sure to add physical state symbol where appropriate. O-0
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- Write a balanced half-reaction for the reduction of aqueous hydrogen peroxide H2O2 to liquid water H2O in basic aqueous solution. Be sure to add physical state symbols where appropriate.Like any piece of apparatus, an electrolytic cell operates atless than 100% efficiency. A cell depositing Cu from a Cu²⁺bath operates for 10 h with an average current of 5.8 A. If 53.4 g ofcopper is deposited, at what efficiency is the cell operating?how to calculate the enthalpy and entropy for experiment " The Thermodynamics of a Galvanic Cell". experiment data attched blow
- Hydrogen gas has the potential for use as a clean fuel inreaction with oxygen. The relevant reaction is2 H2(g) + O2(g) ---->2 H2O(l)Consider two possible ways of utilizing this reaction asan electrical energy source: (i) Hydrogen and oxygengases are combusted and used to drive a generator, muchas coal is currently used in the electric power industry;(ii) hydrogen and oxygen gases are used to generate electricitydirectly by using fuel cells that operate at 85 °C.(a) Calculate ΔH° and ΔS° forthe reaction. We will assume that these values do notchange appreciably with temperature. (b) Based on thevalues from part (a), what trend would you expect forthe magnitude of ΔG for the reaction as the temperatureincreases? (c) What is the significance of the change inthe magnitude of ΔG with temperature with respect to the utility of hydrogen as a fuel? (d) Based on the analysishere, would it be more efficient to use the combustionmethod or the fuel-cell method to generate electricalenergy from…Crude copper containing Fe and Ag as contaminations was subjected toelectro refining by using a current of 175 A for 6.434 min. The mass of anode was found to decrease by 22.260 g, while that of cathode was increased by 22.011 g. Estimate the % of copper, iron and silver in crude copper.Phosphate buffered saline (PBS) is routinely used in the lab to wash cells that are being grown in dishes. Assuming intracellular concentrations are given in the table down below, calculate the Nernst Potential for Na+ and K+ of cells being washed by PBS. The recipe for phosphate buffered saline is given below. (Note, for calcium chloride and magnesium chloride, the amounts are listed as the hydrated salt. This means that for every unit of chloride salt, there is associated water – two water molecules for calcium chloride and six for magnesium chloride – that should be accounted for in the formula weight of the salt.
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