Silver chromate (Ag2CrO4; Ksp = 1.1×10–12) has a molar solubility of 6.5×10–5 M. What calculation provides the concentration of silver ions in a saturated solution of Ag2CrO4?

The neutralization reaction of HNO2 and a strong base is based on:                                            HNO2(aq) + OH–(aq) → H2O(l) + NO2–(aq)               K = 4.5×1010 What is the standard change in Gibbs free energy at 25 oC?

The density of a 5.58 m aqueous acetic acid is 1.04 g∙mL–1.  What is the molar concentration of this solution?  The molar mass of acetic acid, CH3COOH, is 60.06 g∙mol–1.

Given these data for the reaction A + B C, what is the value, with units, for the rate constant? Exp [A]0 (M) [B]0 (M) Initial Rate (M·s–1) 1 0.015 0.015 2.0×10–4 2 0.015 0.045 6.0×10–4 3 0.030 0.045 12.0×10–4    

The experimental data from a certain reaction gives these three graphs. What is the most likely order for this reaction?    

Item stem:          Which energy diagram best matches the proposed mechanism for this exothermic reaction?                 E + S      ES              (fast)                 ES       E + P              (slow)

The solubility of an unknown salt is shown in the graph.  If a solution is unsaturated at 30 oC, what happens when the solution is cooled?

For the decomposition of mercury(II) oxide, HgO, to mercury and oxygen:                                            2HgO(s) → 2Hg(l) + O2(g) ΔGo = 117.1 kJ What is the standard Gibbs free energy of formation (ΔGfo) of mercury(II) oxide?

The pain reliever codeine is a weak base with a Kb equal to 1.6×10–6. What is the pH of a 0.05 M aqueous codeine solution?

What is the pH of a buffer made by combining 45.0 mL of 0.150 M nitrous acid and 20.0 mL of 0.175 M sodium nitrite?  The Ka of nitrous acid, HNO2, is 4.5×10–4.