Calcium can serve as a reducing agent. Describe a test for reducing agents. test observations
A calcium ion is shown by the symbol $^{44}_{20}\text{Ca}^{2+}$. Deduce how many electrons and neutrons are present in this ion. number of electrons number of neutrons
When calcium carbonate is heated in a sealed container, an equilibrium mixture develops. $\text{CaCO}_3(s) \rightleftharpoons \text{CaO}(s) + \text{CO}_2(g)$ The forward reaction is endothermic. Describe and explain the effect, if any, on the position of equilibrium when a hole is made in the container.
Describe and explain the effect, if any, on the position of equilibrium when temperature is raised.
On heating, calcium oxide reacts with chlorine to produce calcium chloride and a gas that relights a glowing splint. Complete the equation for this reaction. $2\text{CaO} + \ldots \rightarrow \ldots\text{CaCl}_2 + \ldots$
Calcium chloride dissolves in water. Name one other calcium salt that is soluble in water.