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Scrat [10]
3 years ago
8

Explain the energy changes that occur when the following reaction happens:

Chemistry
1 answer:
gayaneshka [121]3 years ago
6 0

Answer:

B

Explanation:

H2 + Cl2 → 2HCl

Hmm redox reaction.

Energy is needed to break the bonds of H-H in H2 and Cl-Cl in Cl2

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what is the concentration of an NaOH solution that requires 50 mL of a 1.25 M H2SO4 solution to neutralize 78.0 ml of NaOH​
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Answer:

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Explanation:

The most common way to solve this kind of problem is to use the formula  

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In your problem,

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C₁ =??     v₁= 78.0 mL = 0.078 L

For H₂SO₄

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but you must note that for the reaction of NaOH with H₂SO₄

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So, by applying in above formula

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<u>So, the answer is the concentration of an NaOH = 1.6 M</u>

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