You compared the color of the solutions in three test tubes that initially contained 3 mL of 0.1 M ammonium hydroxide and a few
drops of phenolphthalein indicator. In a second test tube, you added 6 M NH4OH dropwise. Explain, in terms of the ammonia/ammonium ion equilibrium, why the phenolphthalein equilibrium shifted to the right?
1 answer:
Answer: The solution turns more intense pink.
Explanation:
In NH4OH, a delicate ammonia/ammonium equilibrium is set up as shown
NH4+. + OH-<----> NH3 +. H2O
As the concentration of NH4OH increases, the solution turns more intense pink since the equilibrium shifts towards the right and phenolphthalein moves towards the ionized form as more ammonia is produced from the equilibrium above making the solution more basic. The equilibrium shifts for phenolphthalein is shown in the image attached.
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Answer:
45.0 L is the volume of gas will the balloon contain at 1.35 atm and 253 K.
Explanation:
Using Ideal gas equation for same mole of gas as
Given ,
V₁ = 25.0 L
V₂ = ?
P₁ = 2575 mm Hg
Also, P (atm) = P (mm Hg) / 760
P₁ = 2575 / 760 atm = 3.39 atm
P₂ = 1.35 atm
T₁ = 353 K
T₂ = 253 K
Using above equation as:
Solving for V₂ , we get:
<u>V₂ = 45.0 L</u>
45.0 L is the volume of gas will the balloon contain at 1.35 atm and 253 K.