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Art [367]
3 years ago
8

Which of the following describes redox in displacement plating?

Chemistry
1 answer:
ICE Princess25 [194]3 years ago
4 0
It is in an incorrect spot i think
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If a reaction releases 675,000 Joules, how many kcal does it release?
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Answer: If a reaction releases 675,000 Joules then it means it releases 161.328872 kcal.

Explanation:

According to the standard conversion,

1 Joule = 0.000239006 kcal

Therefore, 675,000 Joules will be converted into kcal as follows.

1 Joule = 0.000239006 kcal\\675,000 J = 675000 J \times \frac{0.000239006 kcal}{1 J}\\= 161.328872 kcal

Thus, we can conclude that if a reaction releases 675,000 Joules then it means it releases 161.328872 kcal.

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3 years ago
You are given two acidic solutions of equal concentration and volume: HCl (aq) and HF (aq). Which solution would dissociate more
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HCl will dissociate more fully and produce more H₃O⁺ ions.

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HCl is strong acid and it dissociate fully and produce more H₃O⁺ ions as compared to the HF.

Although H-F is stronger bond as compared to the HCl but stability of product also count, and fluorine ions F⁻ which are formed after dissociation are not more stable as Cl⁻ ions.

Both   F⁻ and Cl⁻ are carried -1 charge, but in case of chloride ions negative charge is spread over large surface area while in case of fluorine it is restricted to small surface. Thus F⁻ are becomes unstable.

Thus in dissociation equilibrium is shifted to wards HF and cause lower dissociation.

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