What type of reaction are these equations?? - dissociation -combination -combust

Question

What type of reaction are these equations?? - dissociation -combination -combustion
_and _ L. CU liplete, od classify of the of the reactions below. Then, assign oxidation states to each atom and indicate the substance oxidized, substance reduced, the oxidizing agent, reducing agent, and the number of electrons transferred. and Ca(s) N2(g) a Ca (5) Substance Reduced Electrons Transferred Substance oxidized: N2 (g) Reducing Agent: Oxidizing Agent Nz ca (s) and b. TiO2(s) H2(g) Ti(s) H20(g) Hg la) Substance Reduced. Electrons Transferred: Substance oxidized: Reducing Agent Oxidizing Agent T 02 (s)

Explanation / Answer

a)

3Ca(s) + N2(g) --> Ca3N2

Note that Ca goes from 0 to +2, it loses 2 electrons, so it is oxidized, therefore, it acts as a reducing agent

Note that N2 goes from 0 to -3, it gais 3 electrons, so it is reduced, therefore, it acts as a oxidizing agent

This is a REDOX reaction, which is combination of 2 species into 1

b)

TiO2 --> Ti must be +4 and O -2, Ti(s) is 0

Ti goes from +4 to 0, it must gain 4 electrons,  so it is reduced, therefore, it acts as a oxidizing agent

H goes from 0 to +1 in H2O , therefore, it loses 1 electron,  so it is oxidized, therefore, it acts as a reducing agent

Total electrons transferred are 4

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