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| 1. |
Why does calcium ( Ca) and magnesium (mg) swim in water ? |
| Answer» \u200b\u200b\u200b\u200b\u200b\u200bCalcium reacts with cold water to form calcium hydroxide and hydrogen gas.Heat produced is so less in which is not enough to burn hydrogen gas.The calcium metal floats on water because the bubbles of Hydrogen gas formed during reaction and increase\xa0the volume of the element and stick to its surface.Magnesium metal reacts with hot water to form magnesium hydroxide and hydrogen gas.The magnesium metal floats on water because the bubbles of Hydrogen gas formed during reaction and increase\xa0the volume of the element and stick to its surface.so,because of the evolution of hydrogen gas that occurs by the formation of bubbles Ca and Mg floats on water. | |