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Which of the following is a tetrabasic acid?
- a)Hypophosphorous acid
- b)Metaphosphoric acid
- c)Pyrophosphoric acid
- d)Orthophosphoric acid
Correct answer is option 'C'. Can you explain this answer?
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Which of the following is a tetrabasic acid?a)Hypophosphorous acidb)Me...
Pyrophosphoric acid (H4P2O7) is tetrabasic acid.
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Which of the following is a tetrabasic acid?a)Hypophosphorous acidb)Me...
Understanding Tetrabasic Acids
Tetrabasic acids are those that can donate four protons (H+) per molecule when dissolved in water. This property is crucial in determining the acidity and the behavior of the acid in chemical reactions.
Identifying the Acids
- Hypophosphorous Acid: This is a monoprotic acid, capable of donating only one proton.
- Metaphosphoric Acid: This is also a monoprotic acid, with one acidic proton available for donation.
- Pyrophosphoric Acid: This is a diprotic acid, meaning it can donate two protons.
- Orthophosphoric Acid: This is a tetrabasic acid, as it can donate four protons. Its formula is H3PO4, and it dissociates in four steps, releasing a proton in each step.
Why Orthophosphoric Acid is Tetrabasic
- Dissociation Steps:
- Step 1: H3PO4 → H2PO4- + H+
- Step 2: H2PO4- → HPO4^2- + H+
- Step 3: HPO4^2- → PO4^3- + H+
- Total Protons: Each step contributes one proton, totaling four protons from one molecule of orthophosphoric acid.
Conclusion
Therefore, among the given options, orthophosphoric acid (option 'C') is the correct answer as it is the only tetrabasic acid that can donate four protons in solution. Understanding the basicity of these acids is essential in various chemical applications, including buffer solutions and biochemical processes.
Tetrabasic acids are those that can donate four protons (H+) per molecule when dissolved in water. This property is crucial in determining the acidity and the behavior of the acid in chemical reactions.
Identifying the Acids
- Hypophosphorous Acid: This is a monoprotic acid, capable of donating only one proton.
- Metaphosphoric Acid: This is also a monoprotic acid, with one acidic proton available for donation.
- Pyrophosphoric Acid: This is a diprotic acid, meaning it can donate two protons.
- Orthophosphoric Acid: This is a tetrabasic acid, as it can donate four protons. Its formula is H3PO4, and it dissociates in four steps, releasing a proton in each step.
Why Orthophosphoric Acid is Tetrabasic
- Dissociation Steps:
- Step 1: H3PO4 → H2PO4- + H+
- Step 2: H2PO4- → HPO4^2- + H+
- Step 3: HPO4^2- → PO4^3- + H+
- Total Protons: Each step contributes one proton, totaling four protons from one molecule of orthophosphoric acid.
Conclusion
Therefore, among the given options, orthophosphoric acid (option 'C') is the correct answer as it is the only tetrabasic acid that can donate four protons in solution. Understanding the basicity of these acids is essential in various chemical applications, including buffer solutions and biochemical processes.
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Which of the following is a tetrabasic acid?a)Hypophosphorous acidb)Metaphosphoric acidc)Pyrophosphoric acidd)Orthophosphoric acidCorrect answer is option 'C'. Can you explain this answer?
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