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A 200-ml sample of water has an initial pH of 10. 30ml of 0.02 N H2so4 is required to titrate the sample to pH 4.5 what is the total alkalinity of the water in milligrams per litre?
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A 200-ml sample of water has an initial pH of 10. 30ml of 0.02 N H2so4...
Total Alkalinity Calculation
To determine the total alkalinity of the water sample, we need to analyze the titration process involving sulfuric acid (H2SO4) and its implications for alkalinity.
Understanding Alkalinity
- Alkalinity is a measure of the capacity of water to neutralize acids.
- It is primarily due to the presence of bicarbonate (HCO3-), carbonate (CO3^2-), and hydroxide (OH-) ions.
Titration Details
- Initial pH of water sample: 10.
- Final pH after titration: 4.5.
- Volume of H2SO4 used: 30 ml.
- Normality of H2SO4: 0.02 N.
Calculating Moles of H2SO4
- Total moles of H2SO4 = Normality × Volume (in liters).
- Convert 30 ml to liters: 30 ml = 0.030 L.
- Moles of H2SO4 = 0.02 N × 0.030 L = 0.0006 equivalents.
Neutralization of Alkalinity
- Each mole of H2SO4 can neutralize 2 moles of hydroxide ions (OH-).
- Total equivalents of OH- neutralized = 0.0006 × 2 = 0.0012 equivalents.
Calculating Total Alkalinity
- Alkalinity is commonly expressed in mg/L as CaCO3.
- Molar mass of CaCO3 = 100 g/mol.
- Total alkalinity (mg/L) = equivalents of OH- × molar mass of CaCO3 × 1000 (to convert g to mg).
Final Calculation of Alkalinity
- Total alkalinity = 0.0012 equivalents × 100 g/mol × 1000 = 120 mg/L.
Conclusion
The total alkalinity of the 200 ml water sample is 120 mg/L, indicating its capacity to neutralize acids effectively. This value is crucial for understanding water quality and its suitability for various uses.
To determine the total alkalinity of the water sample, we need to analyze the titration process involving sulfuric acid (H2SO4) and its implications for alkalinity.
Understanding Alkalinity
- Alkalinity is a measure of the capacity of water to neutralize acids.
- It is primarily due to the presence of bicarbonate (HCO3-), carbonate (CO3^2-), and hydroxide (OH-) ions.
Titration Details
- Initial pH of water sample: 10.
- Final pH after titration: 4.5.
- Volume of H2SO4 used: 30 ml.
- Normality of H2SO4: 0.02 N.
Calculating Moles of H2SO4
- Total moles of H2SO4 = Normality × Volume (in liters).
- Convert 30 ml to liters: 30 ml = 0.030 L.
- Moles of H2SO4 = 0.02 N × 0.030 L = 0.0006 equivalents.
Neutralization of Alkalinity
- Each mole of H2SO4 can neutralize 2 moles of hydroxide ions (OH-).
- Total equivalents of OH- neutralized = 0.0006 × 2 = 0.0012 equivalents.
Calculating Total Alkalinity
- Alkalinity is commonly expressed in mg/L as CaCO3.
- Molar mass of CaCO3 = 100 g/mol.
- Total alkalinity (mg/L) = equivalents of OH- × molar mass of CaCO3 × 1000 (to convert g to mg).
Final Calculation of Alkalinity
- Total alkalinity = 0.0012 equivalents × 100 g/mol × 1000 = 120 mg/L.
Conclusion
The total alkalinity of the 200 ml water sample is 120 mg/L, indicating its capacity to neutralize acids effectively. This value is crucial for understanding water quality and its suitability for various uses.
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A 200-ml sample of water has an initial pH of 10. 30ml of 0.02 N H2so4 is required to titrate the sample to pH 4.5 what is the total alkalinity of the water in milligrams per litre?
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A 200-ml sample of water has an initial pH of 10. 30ml of 0.02 N H2so4 is required to titrate the sample to pH 4.5 what is the total alkalinity of the water in milligrams per litre? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about A 200-ml sample of water has an initial pH of 10. 30ml of 0.02 N H2so4 is required to titrate the sample to pH 4.5 what is the total alkalinity of the water in milligrams per litre? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 200-ml sample of water has an initial pH of 10. 30ml of 0.02 N H2so4 is required to titrate the sample to pH 4.5 what is the total alkalinity of the water in milligrams per litre?.
A 200-ml sample of water has an initial pH of 10. 30ml of 0.02 N H2so4 is required to titrate the sample to pH 4.5 what is the total alkalinity of the water in milligrams per litre? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about A 200-ml sample of water has an initial pH of 10. 30ml of 0.02 N H2so4 is required to titrate the sample to pH 4.5 what is the total alkalinity of the water in milligrams per litre? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 200-ml sample of water has an initial pH of 10. 30ml of 0.02 N H2so4 is required to titrate the sample to pH 4.5 what is the total alkalinity of the water in milligrams per litre?.
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