A solution contains 0.002 M CO32− and 0.002 M OH−. Choose an answer that fulfills the two following questions when Co(NO3)2 is added slowly to the solution above. Ksp(CoCO3) = 1.0×10−13 and Ksp(Co(OH)2) = 1.0×10−15 Which salt will precipitate first AND what concentration of Co(NO3)2 added will cause its precipitation?  

In the compound K2[Mg(EDTA)] the oxidation number and coordination number of Magnesium are [ON] and [CN] respectively.

Consider the complex ion [Mn(CN)6]3–. Which of the following responses includes all of the true statements with respect to this complex ion and the ions from which it was formed, and no false statements? I. The complex ion is octahedral. II. Mn3+ is a d5 ion. III. CN– is a strong field ligand. IV. CN– is a weak field ligand. V. The complex ion is a low spin complex. VI. The complex ion is a high spin complex. VII. The complex ion is diamagnetic VIII. The complex ion is paramagnetic

A solution is prepared by adding 0.10 mol of Cobalt (II) Sulfate, CoSO4, to 1.00 L of water. Which statement about the solution is correct?

What is the pH of 0.50 M aqueous ethylamine (CH3CH2NH2)? (Kb of CH3CH2NH2= 4.3 x 10–4)

A buffer with highest capacity can be achieved when pH is equal to the pKa of its acid component. Consider a buffer solution prepared by adding 0.100 M HCl to [V1] mL of 0.020 M ammonia. At which volume of hydrochloric acid added will the buffer subsequently achieve its highest buffer capacity? Express your answer to 1 decimal place.

The following scenes (1, 2, and 3) represent solutions of silver (black) and chloride (green) ions that are above solid silver chloride AgCl. (The solid, other ions, and water are not shown) a. Which scene best represents the solution in equilibrium with the solid in water? [A] b. In which, if any, other scene(s) will additional solid form? [B] c. Once the equilibrium has established in all scenes if applicable, how will addition HCl (aq) affect the mass of solid present in any scene? [C]    

Classify each of the following as a Lewis acid or a Lewis base. H– : [h-] Br– : [br] Fe3+ : [fe] NH3 : [nh3] BH3 : [bh3]

A buffer with highest capacity can be achieved when pH is equal to the pKa of its acid component. A buffer solution is prepared by adding 0.050 M NaOH to [V1] mL of 0.010 M nitrous acid, HNO2. At which volume of sodium hydroxide added will the buffer subsequently achieve its highest buffer capacity? Input your answer to 1 decimal place.

Consider the crystal field splitting pattern for octahedral complexes to answer the following questions. A. How many electrons are unpaired in a d6 high-spin complex? [A] B. How many electrons are unpaired in a d4 low-spin complex? [B]