Author: Anonymous

Which figure represents a process with a positive entropy change?

What is the standard electrode potential for a galvanic cell constructed in the appropriate way from these two half-cells?                                              Standard Reduction Potentials   Cr3+(aq) + 3e– → Cr(s)              E°red = –0.74 V                                   Co2+(aq) + 2e– → Co(s)              E°red = –0.28 V  

Three compounds with the generic formulas MX; MX2; and M2X all have the same value of Ksp = 2.5×10–8. What describes the relative molar solubilities of these compounds?

Which galvanic cell will have the greatest increase in the measured cell potential relative to the standard cell potential?

The combustion of methane in oxygen is spontaneous 25 oC with all gases at 1 bar:                                            CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) What then is also true at 25 oC?

For the galvanic cell at 298 K                                            Zn(s) + 2In2+(aq)→ Zn2+(aq) + 2In+(aq)                    Eocell =  0.36 V What is the equilibrium constant, K?

Formic acid, HCOOH, is a weak acid with a Ka equal to 1.8×10–4.  What is the pH of a 0.0115 M aqueous formic acid solution?

After 55 years, what mass (in g) remains of a 200.0 g sample of a radioactive isotope with a half-life of 10.0 years?

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What is the coefficient for water when the reaction is balanced in acidic solution? Cr2O72–(aq) + Mn2+(aq) → Cr3+(aq) + MnO2(s)              unbalanced