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Reaction of alkaline earth metals and dilute acids

Answer Text:
5. Reaction of alkaline earth metals and dilute acids
- Generally alkaline earth metals react with dilute acids to form salts and hydrogen gas.
Examples:
With hydrochloric acid.
Beryllium:
- When a piece of beryllium is dropped into a beaker containing hydrochloric acid, there is effervescence of a colourless gas.
- The colourless gas produces a pop sound when exposed to a
burning splint confirming that it is hydrogen gas.
A colourless solution of beryllium chloride remains in the test tube // boiling tube.
Equation: `Be(s) + 2HCl(aq) → BeCl_2(aq) + H_2(g)`
Magnesium:
- When a piece of magnesium is dropped into a beaker containing hydrochloric acid, there is effervescence of a colourless gas.
- The colourless gas produces a pop sound when exposed to a burning splint confirming that it is hydrogen gas.
- A colourless solution of magnesium chloride remains in the test tube // boiling tube.
Equation: `Mg(s) + 2HCl(aq) → MgCl_2(aq) + H_2(g)`
Calcium:
- When a piece of calcium is dropped into a beaker containing hydrochloric acid, there is effervescence of a colourless gas.
- The colourless gas produces a pop sound when exposed to a burning splint confirming that it is hydrogen gas.
- A colourless solution of calcium chloride remains in the test tube // boiling tube.
Equation: `Ca(s) + 2HCl(aq) → CaCl_2(aq) + H_2(g)`