In this video we will describe the equation Ca(OH)2 + H2O and write what happens when Ca(OH)2 is dissolved in water.
Note: Calcium hydroxide is not very soluble in water (15 mg/L at 25°C). So only a small amount would dissolve.
When Ca(OH)2 is dissolved in H2O (water) it will dissociate (dissolve) into Ca +2 and Cl- ions. To show that they are dissolved in water we can write (aq) after each. The (aq) shows that they are aqueous – dissolved in water.
The equation for Ca(OH)2 (Calcium hydroxide) and H2O sometimes isn’t considered a chemical reaction since it is easy to change the Ca 2+ and OH- back to Ca(OH)2 (just let the H2O evaporate). At the same time, the Ca(OH)2 is a very different substance than Ca 2+ and OH-.
If you need to know how to balance chemical reactions, see my complete tutorial on balancing all types of chemical equations:
Balancing Equations in 5 Easy Steps: [ Ссылка ]
More Practice Balancing: [ Ссылка ]
Drawing/writing done in InkScape. Screen capture done with Camtasia Studio 4.0. Done on a Dell Dimension laptop computer with a Wacom digital tablet (Bamboo).
