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Author Question: A solution is prepared by dissolving 0.23 mol of hypochlorous acid and 0.27 mol of sodium ... (Read 121 times)

luminitza

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on: Aug 27, 2018
A solution is prepared by dissolving 0.23 mol of hypochlorous acid and 0.27 mol of sodium hypochlorite in water sufficient to yield 1.00 L of solution. The addition of 0.05 mol of HCl to this buffer solution causes the pH to drop slightly.
 
  The pH does not decrease drastically because the HCl reacts with the ________ present in the buffer solution. The Ka of hypochlorous acid is 1.36  10-3. A) H2O
  B) H3O+
  C) hypochlorite ion
  D) hypochlorous acid
  E) This is a buffer solution: the pH does not change upon addition of acid or base.

Question 2

For the reaction 2 C4H10 (g) + 13 O2 (g)  8 CO2 (g) + 10 H2O (g)
 
  H is -125 kJ/mol and S is +253 J/K  mol. This reaction is ________.
  A) spontaneous at all temperatures
  B) spontaneous only at high temperature
  C) spontaneous only at low temperature
  D) nonspontaneous at all temperatures
  E) unable to determine without more information

Question 3

The angles between sp2 orbitals are ________.
 
  A) 45
  B) 180
  C) 90
  D) 109.5
  E) 120
Chemistry: The Central Science ¦ Brown, LeMay, Bursten ¦ 14th Edition
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frogdreck123456

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Reply #1 on: Aug 27, 2018
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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luminitza

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Reply 2 on: Aug 27, 2018
YES! Correct, THANKS for helping me on my review

laurnthompson

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Reply 3 on: Yesterday
Excellent

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