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.
You might be interested in
0.012moldm⁻³
Explanation:
Given parameters:
Mass of AgNO₃ = 1000mg
Volume of water = 500mL
Unknown:
Molarity of solution = ?
Solution:
The molarity of a solution is the number of moles of a solute dissolved in volume of solvent.
Molarity =
Number of moles of AgNO₃ = ?
Number of moles =
Molar mass of AgNO₃ = 108 + 14 + 3(16) = 170g/mol
convert mass to g;
1000mg = 1g
Number of moles = = 0.00588moles
convert the given volume to dm³;
1000mL = 1dm³;
500mL = 0.5dm³
Now solve;
Molarity = = 0.012moldm⁻³
learn more:
Molarity brainly.com/question/9324116
#learnwithBrainly