Calculate ΔG°rxn for the following reaction at 449.0 K:         CH2O(g) + 2 H2(g)  →  CH4(g) + H2O(g)        ΔH°=  -94.9 kJ ΔS°= -224.2 J/K   Chapter 19 Equations:

Commercial grade HCl solutions are typically 39.0% (by mass) HCl in water.  Determine the molarity of the HCl, if the solution has a density of 1.20 g/mL.  (molar mass of HCl = 36.46 g/mol) Chapter 14 Equations:

Determine the pH of a 0.18 M carbonic acid (H2CO3) solution.  Carbonic acid is a diprotic acid whose Ka1 = 4.3 × 10-7 and Ka2 = 5.6 × 10-11   Chapter 17 & 18 equations: pH = -log[H3O+] pOH = -log[OH-] pH + pOH = 14.00 Kw = 1 x 10-14 Ka x Kb = Kw = [H3O+][OH-] pKa = -log Ka pH = pKa + log  

Which of the following would have the greatest osmotic pressure?   ptable_6.pdf  Chapter 14 Equations:

Find the percent ionization of a 0.337 M HF solution.  The Ka for HF is 3.5 × 10-4   % ionization =

Which of the following gases has the greatest molar entropy at 298K?

You inoculate a TSI slant, LIA slant, and SIM deep with a bacterium.  After incubation, you notice black coloration in each tube.  What is the common substrate in these 3 tests? 

What is the standard cell potential for the spontaneous reaction between these two half cells? Cl2 (g) + 2 e⁻  →  2 Cl⁻(aq)    E° = +1.36 V Fe3+ (aq) + 3 e⁻  →  Fe(s)       E° = -0.04 V

What gas is being produced in this TSI slant?   

The media used for testing antibiotic sensitivity in the Staph Tri-Plate is called?