Author Question: Calculate the pH of a solution prepared by dissolving 0.250 mol of benzoic acid (C7H5O2H) and 0.150 ... (Read 206 times)

SGallaher96 · **on:** Aug 27, 2018

Calculate the pH of a solution prepared by dissolving 0.250 mol of benzoic acid (C7H5O2H) and 0.150 mol of sodium benzoate (NaC7H5O2 ) in water sufficient to yield 1.00 L of solution. The Ka of benzoic acid is 6.50 10-5.

A) 4.409
B) 3.965
C) 10.035
D) 9.591
E) 5.190

Question 2

The oxidation numbers of nitrogen in the nitride ion, hydrazine, ammonium cation, and nitrate ion are ________, ________, ________, and ________, respectively.

A) -3, -2, -3, +5
B) +3, -2, -3, +5
C) +3, -2, +1, +3
D) -3, +2, +1, +5
E) -3, +2, -3, +3

Question 3

Of the following substances, only ________ has London dispersion forces as its only intermolecular force.

A) CCl4
B) SnF3
C) CH3OH
D) HI
E) H2O

samiel-sayed · **Reply #1 on:** Aug 27, 2018

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