lordofevilsocks:
When potassium metal is placed in water, a large amount of energy is released as potassium hydroxide and hydrogen gas are produced in the reaction 2K(s) + 2H2O(l) → 2KOH(aq) + H2(g). Your lab partner says this is a redox reaction and a combustion reaction. Do you agree? Defend your answer by explaining whether or not it meets the requirements of each type of reaction.
Vocaloid:
- Combustion reactions occur when one or more reagents react w/ **oxygen** to release energy and water. Compare this to your reaction to determine whether this is a combustion reaction or not - Redox reactions occur when one reactant gains electron(s) and the other reactant loses electron(s). Calculate the oxidation states of K in K(s) vs. KOH, as well as the oxididation states of H in H2O vs. H2. if you notice one gains electrons and the other loses electrons, then it's redox. Otherwise, it's not.
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