Question

ListenBase your answer to the question on the information below.Soil pH can affect the development of plants. For example, a hydrangea plant produces blue flowers when grown in acidic soil but pink flowers when grown in basic soil. Evergreen plants can show a yellowing of foliage, called chlorosis, when grown in soil that is too basic.Acidic soil can be neutralized by treating it with calcium hydroxide, Ca(OH)2, commonly called slaked lime. Slaked lime is slightly soluble in water.Which equation correctly shows the neutralization of the ions in acidic soil by the ions released by slaked lime in water?Ca(OH)2(s) + H2O → Ca(OH)2(aq)H3O+(aq) + OH−(aq) → 2H2O(l)Ca(OH)2(s) + H2O → Ca+2 + 2OH−2H2O(l) → H3O+(aq) + OH−(aq)

Answer 1

`\boxed{\text{H$_(3)$O$^(+)$ + OH$^(-) \longrightarrow$ 2H$_(2)$O}}`

Step-by-step explanation:

1. "Molecular" equation

`\rm Ca(OH)$_(2)$ + 2H$_(3)$O$^(+) \longrightarrow \,$ Ca$^(2+)$ + 4H$_(2)$O`

2. Ionic equation

`\rm \textbf{Ca}$^(2+)$ + 2OH$^(-)$ + 2H$_(3)$O$^(+)$ \longrightarrow \textbf{Ca}$^(2+)$ + 4H$_(2)$O`

3. Net ionic equation

Cancel all ions that appear on both sides of the reaction arrow (in boldface).

`\rm 2OH$^(-)$ + 2H$_(3)$O$^(+) \longrightarrow$ 4H$_(2)$O`

Divide every coefficient by 2.

`\rm OH$^(-)$ + H$_(3)$O$^(+) \longrightarrow$ 2H$_(2)$O`