Answer to Question #113568 in General Chemistry for jeff

Question

The optimum pH for hydrangea flowering plant is around a pH of 6.35. What is the best solution that can be used as a buffer for this type of plant. Show calculations to support your choice.

Answer 1

Bigleaf hydrangeas, H. macrophylla, react to changes in soil pH. A low soil pH allows hydrangeas to absorb aluminum, which turns the flowers a beautiful blue color. To increase blue hydrangea flowers, lower your soil pH by adding sulfur or peat moss to the soil. You can also add additional aluminum sulfate to your soil throughout the growing season. Pink and red flowers shine when you add ground limestone to increase the pH.