In a double-replacement reaction, the _____.

2 answers:

8 0

In a double-replacement reaction, the _____.?

There are many more interesting things to ask about double replacement reactions than are contained in the list given here. But the only correct choice is:

C.reactants are two ionic compounds

ElenaW [278]3 years ago

4 0

Answer: Option (c) is the correct answer.

Explanation:

A reaction in which there is exchange of two ions of two different compounds then this type of reaction is known as double-replacement reaction.

For example, $Na_{2}S + 2HCl \rightarrow 2NaCl + H_{2}S$

Therefore, this results in the formation of two new ionic compounds whose properties are different from their reactants.

Thus, we can conclude that in a double-replacement reaction, the reactants are two ionic compounds.

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A 155.0 g piece of copper at 128 oC is dropped into 250.0 g of water at 17.9 oC. (The specific heat of copper is 0.385 J/goC.) C

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$T_{eq}=23.85^oC$

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In this case, as the copper's heat loss is gained by the water, the following energetic relationship is:

$\Delta H_{Cu}=-\Delta H_{H_2O}$

Therefore the equilibrium temperature shows up as:

$m_{Cu}Cp_{Cu}(T_{Cu}-T{eq}) = m_{H_2O}Cp_{H_2O}(T_{eq}-T_{H_2O})\\\\T_{eq}=\frac{m_{Cu}Cp_{Cu}T_{Cu}-m_{H_2O}Cp_{H_2O}T_{H_2O}}{m_{Cu}Cp_{Cu}-m_{H_2O}Cp_{H_2O}} \\$