Blog

For the following reaction, Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s), calculate the emf at 25 °C with a [Zn(NO3)2] = 0.025 M and [Cu(NO3)2] = 0.50 M given the E° = 1.1 V, R = 8.314 J/K-mol, and F = 96,485 J/V-mol.

Which would be correct expression of the solubility product constant, Ksp, for Fe(OH)3?

A buffer is made by adding 0.300 mol CH3COOH and 0.300 mol CH3COONa to enough water to make 1.000 L of solution. The pH of the buffer is 4.74. Calculate the pH of this solution after 15.0 mL of 4.0 M NaOH(aq) solution is added.

If the pH of a solution is 6.27, which of the following statements is true?

In a voltaic cell, which direction do electrons flow?

A reaction can only be spontaneous if which of the following conditions are true?

What is the oxidation number for iron in Fe2O3?

For the reaction Fe3+(aq) + Co2+(aq) → Fe2+(aq) + Co3+(aq), what is the oxidizing reagent?

A reaction involves 2 different reactants and both reactants are first order. How does the rate change if the concentration of one reactant is doubled while the concentration of the second reactant is held constant?

The decomposition reaction of N2O5 in carbon tetrachloride is 2 N2O5 → 4 NO2 + O2. The rate law is first order in N2O5. At 64 °C the rate constant is 4.82 × 10–3 s–1. What is the rate of reaction when [N2O5] = 1.00 M?