Author: Anonymous

Which of the following is the correct structural formula for 2,3-dimethylbutane?

A solution with a concentration higher than the solubility ___.

Write the correct mathematical expression for the solubility product constant, ksp, of calcium phosphate, Ca3(PO4)2.

Calculate the standard cell potential (Ecell) for a galvanic cell running on the following standard reduction potentials: Al3+ (aq)   +   3e-  —}  Al (s)     Eo = -1.66 /V Ni2+ (aq)   +  2e-  —}  Ni (s)     Eo = -0.25 /V

During the discharge of a galvanic cell, in which direction do the ions contained within the salt bridge migrate?

What is the conjugate base of the hydrogen phosphate ion, HPO42-? 

The molar solubility of silver chromate Ag2CrO4 in pure water is 6.5 x 10-5 M at 25 C. What is its ksp?

Hexane, C6H14 (mw=86) has a boiling point of 68º. Ethanol, CH3CH2OH (mw=46) has a boiling point of 78º. Mark the following statement as TRUE or FALSE. Ethanol must have stronger intermolecular attraction, based on its higher boiling point

Calculate the standard entropy change (ΔS) for the following reaction at 25 oC:                                    2 H2 (g)   +   O2 (g)   —}  2 H2O (l)Given So values: H2 (g) = 130.7 J/K mol,                             O2 (g) = 205.2 J/K mol,                             H2O (l) = 70.0 J/k mol

What is the pH of a buffer solution prepared by mixing 0.20 M CH3COOH and 0.15 M NaCH3COO (For CH3COOH, Ka = 1.8 x 10-5.  Hint: Henderson Hasselbalch.