Consider the following aqueous reaction between ammonia (NH3) and formic acid (HCOOH): NH4+ (aq)  + HCOO─ (aq)   ⇌    NH3 (aq)  +  HCOOH (aq)   Identify the stronger acid and predict whether the equilibrium lies to the left or to the right? Hint: The Ka of HCOOH is 1.8 x 10─4 Hint: The Ka of NH4+ is 5.5 x 10─10

A 0.025 M solution of acetic acid (CH3COOH)  has a pH of 2.98. What is the percent ionization of this solution?

Which of the following solutions will have the highest pH? Hint: This is not a calculation problem. Consider the type of acid and base (strong vs. weak acid and base).  

Copper metal, Cu (s), is produced by running a current through a solution of Cu2+ in an electrolytic cell. How many grams of copper metal can be deposited from Cu²⁺(aq) when a current of 2.50 A is run for 2.00 h? Hint:  F = 96,500 C/mol e− Hint:  1 A = 1 C/s

Consider the reaction of elemental bromine with elemental chlorine to make a bromochloride compound at 600 K:                                        2 BrCl(g)   ⇌   Br2(g)  +  Cl2(g)         KP = 81.0 A closed vessel at 600 K is charged with 3.00 atm of BrCl initially and allowed to reach equilibrium. What is the partial pressure of the Br2 (in atm) at that equilibrium?

Consider the pH curve when acetic acid (CH3COOH) is titrated with sodium hydroxide (NaOH):   What specie(s) are predominately present at point D in this titration?

Which of the following solutions has the lowest H⁺ concentration?  Hint: Consider the common ion effect and how it would change the percent ionization of the weak acid. 

Consider a 1.00 L buffer solution made with 0.600 mol of HF (Ka = 6.8 × 10⁻⁴) and 0.400 mol of NaF.    What is the pH of the solution after the addition of 0.100 mol of HCl. Hint:  Assume no change in volume upon addition of HCl

Consider the following aqueous reaction between ammonia (NH3) and formic acid (HCOOH): NH3 (aq)  +  HCOOH (aq)   ⇌  NH4+ (aq)  + HCOO─ (aq) Identify the stronger acid and predict whether the equilibrium lies to the left or to the right? Hint: The Ka of HCOOH is 1.8 x 10─4 Hint: The Ka of NH4+ is 5.5 x 10─10

Phophorous-32 decays by beta emission to form sulfur-32.   (In case the picture does not show: The picture indicated that 24 P-32 decayed to 3 P-32 in 18 min. )  What is the decay constant, k, for P-32?