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VashaNatasha [74]
3 years ago
13

Without a catalyst, a reaction may require very high temperatures in order to occur. How does a catalyst speed a reaction at low

temperatures? It raises the amount of energy required to break chemical bonds. It lowers the amount of energy required to break chemical bonds. It increases the concentration of the reactant particles. It decreases the concentration of the reactant particles.
Chemistry
2 answers:
Wittaler [7]3 years ago
7 0

It lowers the amount of energy required to break chemical bonds.

Marrrta [24]3 years ago
4 0

The correct answer is "It lowers the amount of energy required to break chemical bonds."

Catalyst work by decreasing the activation energy of a chemical reaction. Activation energy is the minimum energy required to start a chemical reaction. For a chemical reaction to start the bonds in the reactant molecules are broken and new bonds are formed in the product molecules. Thus catalyst facilitate to break chemical bonds in reactants  by lowering the activation energy.

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Explanation:

Balanced chemical reaction equation will be as follows.

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Oxidation: 2Fe^{2+}(aq) \rightleftharpoons 2Fe^{3+}(aq) + 2e^{-}[/tex] .... (1)

Reduction: 2H^{+}(aq) + 2e^{-} \rightleftharpoons H_{2}(g) ...... (2)

On adding both equation (1) and (2), the overall reaction equation will be as follows.

     2Fe^{2+}(aq) + 2H^{+}(aq) \rightleftharpoons 2Fe^{3+}(aq) + H_{2}(g)

Therefore, neutral iron is a part of Heme - b group of Hemoglobin and in an aqueous solution it dissolutes as a part of Heme group. Hence, then it becomes an Fe^{2+} cation.

3 0
3 years ago
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andriy [413]
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</span>
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3 0
3 years ago
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6 0
3 years ago
Read 2 more answers
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