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If equal volume of 0.1 M NH4OH and 0.1 M HCI are mixed, then the pH of resulting mixture will be (Given: pKb(NH4OH) = 4.75, log 5 = 0.7 (1) 8.72 (2) 6.28. (3) 7.28 (4) 5.28?
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If equal volume of 0.1 M NH4OH and 0.1 M HCI are mixed, then the pH of...
Calculation of pH of resulting mixture:
- The given pKb of NH4OH is 4.75, which means pKa of NH4OH is 14 - 4.75 = 9.25.
- When NH4OH reacts with HCl, it forms NH4Cl and H2O.
- The NH4Cl formed is a salt of weak base NH4OH and strong acid HCl.
- Since NH4Cl is a salt of weak base and strong acid, it will undergo hydrolysis in water.
- The hydrolysis reaction of NH4Cl will release H3O+ ions, resulting in the solution becoming acidic.
Calculating the pH:
- Given that the concentration of NH4OH and HCl is 0.1 M each.
- The initial concentration of NH4OH and HCl will be reduced due to the reaction between them.
- The moles of NH4OH and HCl will be equal in the mixture after the reaction.
- The moles of NH4OH used in the reaction will be equal to the moles of HCl used.
- The excess of NH4OH left will react with water to form NH3 and H3O+ ions.
- The concentration of NH3 formed can be calculated using the equilibrium constant expression.
- The concentration of H3O+ ions will also be formed due to the reaction of NH4Cl with water.
- Finally, the pH of the resulting mixture can be calculated using the concentration of H3O+ ions.
Therefore, the pH of the resulting mixture will be 5.28 (option 4).
- The given pKb of NH4OH is 4.75, which means pKa of NH4OH is 14 - 4.75 = 9.25.
- When NH4OH reacts with HCl, it forms NH4Cl and H2O.
- The NH4Cl formed is a salt of weak base NH4OH and strong acid HCl.
- Since NH4Cl is a salt of weak base and strong acid, it will undergo hydrolysis in water.
- The hydrolysis reaction of NH4Cl will release H3O+ ions, resulting in the solution becoming acidic.
Calculating the pH:
- Given that the concentration of NH4OH and HCl is 0.1 M each.
- The initial concentration of NH4OH and HCl will be reduced due to the reaction between them.
- The moles of NH4OH and HCl will be equal in the mixture after the reaction.
- The moles of NH4OH used in the reaction will be equal to the moles of HCl used.
- The excess of NH4OH left will react with water to form NH3 and H3O+ ions.
- The concentration of NH3 formed can be calculated using the equilibrium constant expression.
- The concentration of H3O+ ions will also be formed due to the reaction of NH4Cl with water.
- Finally, the pH of the resulting mixture can be calculated using the concentration of H3O+ ions.
Therefore, the pH of the resulting mixture will be 5.28 (option 4).
Community Answer
If equal volume of 0.1 M NH4OH and 0.1 M HCI are mixed, then the pH of...
S.A & W.B => pH= 7 - (pkb/2) - (log c/2)
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If equal volume of 0.1 M NH4OH and 0.1 M HCI are mixed, then the pH of resulting mixture will be (Given: pKb(NH4OH) = 4.75, log 5 = 0.7 (1) 8.72 (2) 6.28. (3) 7.28 (4) 5.28?
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If equal volume of 0.1 M NH4OH and 0.1 M HCI are mixed, then the pH of resulting mixture will be (Given: pKb(NH4OH) = 4.75, log 5 = 0.7 (1) 8.72 (2) 6.28. (3) 7.28 (4) 5.28? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about If equal volume of 0.1 M NH4OH and 0.1 M HCI are mixed, then the pH of resulting mixture will be (Given: pKb(NH4OH) = 4.75, log 5 = 0.7 (1) 8.72 (2) 6.28. (3) 7.28 (4) 5.28? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If equal volume of 0.1 M NH4OH and 0.1 M HCI are mixed, then the pH of resulting mixture will be (Given: pKb(NH4OH) = 4.75, log 5 = 0.7 (1) 8.72 (2) 6.28. (3) 7.28 (4) 5.28?.
If equal volume of 0.1 M NH4OH and 0.1 M HCI are mixed, then the pH of resulting mixture will be (Given: pKb(NH4OH) = 4.75, log 5 = 0.7 (1) 8.72 (2) 6.28. (3) 7.28 (4) 5.28? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about If equal volume of 0.1 M NH4OH and 0.1 M HCI are mixed, then the pH of resulting mixture will be (Given: pKb(NH4OH) = 4.75, log 5 = 0.7 (1) 8.72 (2) 6.28. (3) 7.28 (4) 5.28? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If equal volume of 0.1 M NH4OH and 0.1 M HCI are mixed, then the pH of resulting mixture will be (Given: pKb(NH4OH) = 4.75, log 5 = 0.7 (1) 8.72 (2) 6.28. (3) 7.28 (4) 5.28?.
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