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The heats of neutralisation of CH3COOH, HCOOH, HCN and H2S are – 13.2, – 13.4, – 2.9 and – 3.8 kcal per equivalent respectively. Arrange the acids in increasing order of strength
- a)HCOOH > CH3COOH > H2S > HCN
- b)CH3COOH > HCOOH > H2S > HCN
- c)H2S > HCOOH > CH3COOH > HCN
- d)HCOOH > H2S > CH3COOH > HCN
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
The heats of neutralisation of CH3COOH, HCOOH, HCN and H2S are – 13.2...
Explanation:
The strength of an acid can be determined by the heat of neutralization, which is the heat released when one equivalent of acid reacts with one equivalent of base to form a salt and water.
The heat of neutralization is a measure of the strength of the acid, as stronger acids release more heat during neutralization.
Given the heats of neutralization of CH3COOH, HCOOH, HCN, and H2S as -13.2, -13.4, -2.9, and -3.8 kcal per equivalent respectively, we can arrange the acids in increasing order of strength as follows:
HCOOH > H2S > CH3COOH > HCN
Here's the explanation for the correct answer option 'D':
HCOOH > H2S > CH3COOH > HCN
1. HCOOH (Formic Acid) has the highest heat of neutralization (-13.4 kcal/equivalent), indicating that it is the strongest acid among the given options. It releases the most heat during neutralization, suggesting a more exothermic reaction.
2. H2S (Hydrogen Sulfide) has the second highest heat of neutralization (-3.8 kcal/equivalent). Although it is weaker than formic acid, it is stronger than the other two acids.
3. CH3COOH (Acetic Acid) has a heat of neutralization of -13.2 kcal/equivalent, which is lower than formic acid but higher than hydrogen sulfide.
4. HCN (Hydrogen Cyanide) has the lowest heat of neutralization (-2.9 kcal/equivalent), indicating that it is the weakest acid among the given options.
Therefore, the correct order of acid strength is HCOOH > H2S > CH3COOH > HCN.
The strength of an acid can be determined by the heat of neutralization, which is the heat released when one equivalent of acid reacts with one equivalent of base to form a salt and water.
The heat of neutralization is a measure of the strength of the acid, as stronger acids release more heat during neutralization.
Given the heats of neutralization of CH3COOH, HCOOH, HCN, and H2S as -13.2, -13.4, -2.9, and -3.8 kcal per equivalent respectively, we can arrange the acids in increasing order of strength as follows:
HCOOH > H2S > CH3COOH > HCN
Here's the explanation for the correct answer option 'D':
HCOOH > H2S > CH3COOH > HCN
1. HCOOH (Formic Acid) has the highest heat of neutralization (-13.4 kcal/equivalent), indicating that it is the strongest acid among the given options. It releases the most heat during neutralization, suggesting a more exothermic reaction.
2. H2S (Hydrogen Sulfide) has the second highest heat of neutralization (-3.8 kcal/equivalent). Although it is weaker than formic acid, it is stronger than the other two acids.
3. CH3COOH (Acetic Acid) has a heat of neutralization of -13.2 kcal/equivalent, which is lower than formic acid but higher than hydrogen sulfide.
4. HCN (Hydrogen Cyanide) has the lowest heat of neutralization (-2.9 kcal/equivalent), indicating that it is the weakest acid among the given options.
Therefore, the correct order of acid strength is HCOOH > H2S > CH3COOH > HCN.
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Community Answer
The heats of neutralisation of CH3COOH, HCOOH, HCN and H2S are – 13.2...
The greater the (negative value) of heat of neutralisation, the more is the strength of the acid. Hence,
HCOOH > CH3COOH > H2S >HCN
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The heats of neutralisation of CH3COOH, HCOOH, HCN and H2S are – 13.2, – 13.4, – 2.9 and – 3.8 kcal per equivalent respectively. Arrange the acids in increasing order of strengtha)HCOOH > CH3COOH > H2S > HCNb)CH3COOH > HCOOH > H2S > HCNc)H2S > HCOOH > CH3COOH > HCNd)HCOOH > H2S > CH3COOH > HCNCorrect answer is option 'D'. Can you explain this answer?
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