how do sodium,calcium and magnesium react with water? plz give full answer
Answers
Answer:
they react vigorously with water .
Explanation:
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Answer:
When you go from top to bottom, the reactivity (regarding electron loss) gets higher. So Calcium reacts with water normally as Sodium does.
Ca + 2H2O = Ca(OH)2 + H2
You can observe a gas getting exerted, thus providing an evidence for a chemical reaction.
However, with Magnesium, things seem to be a bit different. Unlike Calcium, Magnesium has its valence shell electrons much closer to the nucleus than Calcium. Hence, it’s so hard to remove those two electrons from the valence shell with the energy in cool water. (Cool water or tap water has low temperature values, therefore low energy values)
If you want to observe a chemical reaction with Magnesium, you need to have hot water. Hot water has enough energy to react with Magnesium, as hot water has high-energy particles rather than tapwater.
Mg + 2H20 = Mg(OH)2 + H2
With steam, The equation gets much more complicated. Steam has much higher energy so it has enough energy to dissociate the hydroxide into water providing magnesium oxide and hydrogen gas.
Mg + H20 = MgO + H2
Sodium metal reacts rapidly with water to form a colourless solution of sodium hydroxide (NaOH) and hydrogen gas (H2). The resulting solution is basic because of the dissolved hydroxide. The reaction is exothermic. During the reaction, the sodium metal may well become so hot that it catches fire and burns with a characteristic orange colour. The reaction is slower than that of potassium (immediately below sodium in the periodic table), but faster than that of lithium (immediately above sodium in the periodic table).
2Na(s) + 2H2O → 2NaOH(aq) + H2(g)
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