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10 mL of a blood sample (containing Calcium oxalate) is dissolved in an acid. It required 20 mL of 0.001 M KMnO(which oxidizes oxalate to CO2). Hence, Ca2+ ion in 10 mL blood is:             
  • a)
    0.200 g                        
  • b)
    0.002 g                           
  • c)
    0.02 g                       
  • d)
    2.00 g
Correct answer is option 'B'. Can you explain this answer?
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Overview of the Reaction
In this experiment, oxalate ions (C2O4^2-) from the blood sample are oxidized to carbon dioxide (CO2) by potassium permanganate (KMnO4) in an acidic medium.
Calculation Steps
1. Determine Moles of KMnO4 Used:
- The concentration of KMnO4 is 0.001 M.
- Volume of KMnO4 used = 20 mL = 0.020 L.
- Moles of KMnO4 = Concentration × Volume = 0.001 mol/L × 0.020 L = 0.00002 moles.
2. Stoichiometry of the Reaction:
- The balanced reaction shows that 1 mole of KMnO4 reacts with 5 moles of oxalate ions.
- Therefore, moles of oxalate = 5 × moles of KMnO4 = 5 × 0.00002 = 0.0001 moles.
3. Molar Mass of Calcium Oxalate:
- The molar mass of calcium oxalate (CaC2O4) = 40 (Ca) + 2*12 (C) + 4*16 (O) = 146 g/mol.
4. Mass of Oxalate in Blood Sample:
- Mass of oxalate = moles × molar mass = 0.0001 moles × 146 g/mol = 0.0146 g.
5. Calculating Calcium Ions:
- Since each molecule of calcium oxalate contains 1 Ca2+ ion, the mass of Ca2+ in the blood sample = 0.0146 g of CaC2O4 * (40 g/mol Ca / 146 g/mol CaC2O4) = 0.0040 g of Ca2+.
6. Scale to 10 mL Blood Sample:
- Since the calculation is based on the 10 mL sample, we directly consider the mass of Ca2+.
Final Result
The mass of Ca2+ ions in the 10 mL blood sample is approximately 0.002 g, confirming that the correct answer is option B.
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10 mL of a blood sample (containing Calcium oxalate) is dissolved in an acid. It required 20 mL of 0.001 M KMnO4(which oxidizes oxalate to CO2). Hence, Ca2+ ion in 10 mL blood is:a)0.200 gb)0.002 gc)0.02 gd)2.00 gCorrect answer is option 'B'. Can you explain this answer?
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10 mL of a blood sample (containing Calcium oxalate) is dissolved in an acid. It required 20 mL of 0.001 M KMnO4(which oxidizes oxalate to CO2). Hence, Ca2+ ion in 10 mL blood is:a)0.200 gb)0.002 gc)0.02 gd)2.00 gCorrect answer is option 'B'. Can you explain this answer? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about 10 mL of a blood sample (containing Calcium oxalate) is dissolved in an acid. It required 20 mL of 0.001 M KMnO4(which oxidizes oxalate to CO2). Hence, Ca2+ ion in 10 mL blood is:a)0.200 gb)0.002 gc)0.02 gd)2.00 gCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 10 mL of a blood sample (containing Calcium oxalate) is dissolved in an acid. It required 20 mL of 0.001 M KMnO4(which oxidizes oxalate to CO2). Hence, Ca2+ ion in 10 mL blood is:a)0.200 gb)0.002 gc)0.02 gd)2.00 gCorrect answer is option 'B'. Can you explain this answer?.
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