A: Study of the Weak-Acid Equilibrium: Hso(aq)Hou) H0 aa) + SO(aq) red 1. When a
ID: 543812 • Letter: A
Question
A: Study of the Weak-Acid Equilibrium: Hso(aq)Hou) H0 aa) + SO(aq) red 1. When adding sodium sulfate solution, how did the color of the equilibrium mixture change? yellowlorange a. The color change indicated a shift in the point of equilibrium. In which direction equilibrium shift? left R) right b.Explain your answer to question 1a. You should indicate which ion was added to or removed from the equilibrium mixture. 2. When adding sodium hydrogen sulfate crystals, how did the color of the equilibrium mixture change? a. The color change indicated a shift in the point of equilibrium. In which direction did the (L) left equilibrium shift? R) right Explain your answer to question 2a. You should indicate which ion was added to or removed from the equilibrium mixture. b. (L) left (R) right -3. Upon heating in which direction is the equilibrium shifting? (L) left (R) right 4. Upon cooling in which direction is the equilibrium shifting? A. endothermic B. exothermic 5. Is the forward reaction 6. Explain your answers to questions 3,4, and 5Explanation / Answer
1. The color is the equilibrium mixture change to red on addition of sodium sulfate.
a. The equilibrium shifts in the (R) right direction.
b. We are adding sodium sulfate (Na2SO4) to the follwing reaction
HSO4 + H2O H3O+ + SO42
Na2SO4 ----> 2 Na+ + SO42
Due to the common ion effect of SO42, the equilibrium shift in the right direction.