Q13E

Question

Indicate what type or types of reaction each of the following represents:

(a) \(\)\(Ca\left( s \right) + B{r_2}\left( l \right) \to CaB{r_2}\left( s \right)\)

(b) \(Ca{\left( {OH} \right)_2} + 2HBr\left( {aq} \right) \to CaB{r_2}\left( {aq} \right) + 2{H_2}O\left( l \right)\)

(c) \({C_6}{H_{12}}\left( l \right) + 9{O_2}\left( g \right) \to 6C{O_2}\left( g \right) + 6{H_2}O\left( l \right)\)\(\)

Step-by-Step Solution

Verified

Answer

(a) Oxidation-reduction reaction

(b) Acid-base reaction

1Step 1: Oxidation-reduction reaction (a)

The calcium atom is oxidized from 0 to +2 state by the liquid bromine, while bromine is reduced from 0 to -1 state. Hence, it is anoxidation-reduction (redox) reaction.

2Step 2: Neutralisation reaction (b)

There is a transfer of hydrogen and hydroxyl ions between the reactants to form calcium bromide salt and water. Hence, it is an acid-base neutralization reaction.

3Step 3: Combustion reaction(c)

The carbon is oxidized from -2 to +4 state and the oxygen is reduced from 0 to -2 state. Hence, it is anoxidation-reduction (redox) reaction.

Q12E

Q14E

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