1. Using standard reduction potentials (Table D in Appendix II), calculate the standard cell potential (EEcell) for each of the following reactions. Which of these reactions do you expect to occur spontaneously in the forward direction? (a) Cl2(g) + 2 I – (aq) ® 2 Cl – (aq) + I2(s) Reduction half-reaction: Cl2 + 2 […]
1. Determine the oxidation number of the indicated atom in each of the following compounds or ions. (a) each iron atom in Fe2O3 The oxidation number of each oxygen atom is – 2. The total for all the oxygen atoms is – 6. Thus, the total for both iron atoms is +6. Therefore, the oxidation […]
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 […]