A few drops of universal indicator have been added to the water. Questionĭescribe and explain the observations when a small piece of lithium is placed on the surface of a big container of water. In general, the more reactive the metal, the more rapid the reaction is. Sodium + water → sodium hydroxide + hydrogen Currently having trouble with remembering the reactivity series so if anyone has a mnemonic thatll help please add it to this thread. For example, sodium reacts rapidly with cold water: When a metal reacts with water, a metal hydroxide and hydrogen are formed. Hydrogen and carbon are shown for comparison. The table summarises some reactions of metals in the reactivity series.
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