1. A solution is 0.50M with respect to HCl and 1.00M with respect to formic acid, HCOOH. Calculate the concentration of the formate ion, HCOO –, in this solution. Is the concentration of HCOO – found in this solution greater than, less than, or equal to that found in a 1.00M solution of formic acid? […]
1. Lactic acid (CH3CHOHCOOH) has one acidic hydrogen. A 0.10 M aqueous solution of lactic acid has a pH of 2.43. Calculate the value of Ka for lactic acid. lactic acid CH3CHOHCOOH(aq) + H2O(l) W H3O+ (aq) + CH3CHOHCOO – (aq) Ka = ([H3O+ ][CH3CHOHCOO – ])/[CH3CHOHCOOH] [H3O+ ]eq = 10 – pH = 10 […]
1. For each of the following reactions, identify the Bronsted acid, the Bronsted base, the conjugate base, and the conjugate acid. Also, for each reaction predict whether the equilibrium lies predominantly on the reactants side or the products side. Refer to Figure 15.12 in the textbook. Remember a reaction will proceed from the stronger acid […]
1. Using the values of DHf° and S° provided, calculate the quantities listed below for the following phase change in ethanol, CH3CH2OH. CH3CH2OH(l) ⇄ CH3CH2OH(g) DHf° [CH3CH2OH(l)] = -277.69 kJ/mol DHf° [CH3CH2OH(g)] = -235.10 kJ/mol S°[CH3CH2OH(l)] = 160.7 J/mol·K S°[CH3CH2OH(g)] = 282.7 J/mol·K The sign of DS°total will inform us as to whether […]
