Author: Anonymous

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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

What statement about a galvanic cell constructed with Cu+/Cu and Fe2+/Fe is correct? Standard Reduction Potentials Eored / V Cu+ + e– → Cu +0.52 Fe2+ + 2e– → Fe –0.44

Which aqueous solution all at 25 oC will have the lowest osmotic pressure?  

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    

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?