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25.3 g of sodium carbonate, Na2CO3 is dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates completely, molar concentration of sodium ions, Na+ and carbonate ions CO2-3 are respectively (Molar mass of Na2CO3 = 106 g mol-1)
- a)0.955 M and 1.910 M
- b)1.910 M and 0.955 M
- c)1.90 M and 1.910M
- d)0.477 M and 0.477 M
Correct answer is option 'B'. Can you explain this answer?
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Calculation:
- Given mass of Na2CO3 = 25.3 g
- Molar mass of Na2CO3 = 106 g/mol
- Number of moles of Na2CO3 = 25.3 g / 106 g/mol = 0.238 moles
Molar concentration of Na+ ions:
- Since Na2CO3 dissociates into 2 Na+ ions, the number of moles of Na+ ions = 2 * 0.238 = 0.476 moles
- Volume of solution = 250 mL = 0.25 L
- Molar concentration of Na+ ions = 0.476 moles / 0.25 L = 1.904 M
Molar concentration of CO2-3 ions:
- Since Na2CO3 dissociates into 1 CO2-3 ion, the number of moles of CO2-3 ions = 0.238 moles
- Molar concentration of CO2-3 ions = 0.238 moles / 0.25 L = 0.952 M
Therefore, the molar concentration of sodium ions (Na+) is 1.904 M and the molar concentration of carbonate ions (CO2-3) is 0.952 M. Hence, option B is the correct answer.
- Given mass of Na2CO3 = 25.3 g
- Molar mass of Na2CO3 = 106 g/mol
- Number of moles of Na2CO3 = 25.3 g / 106 g/mol = 0.238 moles
Molar concentration of Na+ ions:
- Since Na2CO3 dissociates into 2 Na+ ions, the number of moles of Na+ ions = 2 * 0.238 = 0.476 moles
- Volume of solution = 250 mL = 0.25 L
- Molar concentration of Na+ ions = 0.476 moles / 0.25 L = 1.904 M
Molar concentration of CO2-3 ions:
- Since Na2CO3 dissociates into 1 CO2-3 ion, the number of moles of CO2-3 ions = 0.238 moles
- Molar concentration of CO2-3 ions = 0.238 moles / 0.25 L = 0.952 M
Therefore, the molar concentration of sodium ions (Na+) is 1.904 M and the molar concentration of carbonate ions (CO2-3) is 0.952 M. Hence, option B is the correct answer.
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25.3 g of sodium carbonate, Na2CO3 is dissolved in enough water to make 250 mL ofsolution.If sodium carbonate dissociatescompletely, molar concentration of sodium ions, Na+and carbonate ions CO2-3are respectively(Molar mass of Na2CO3 = 106 g mol-1)a)0.955 M and 1.910 Mb)1.910 M and 0.955 Mc)1.90 M and 1.910Md)0.477 M and 0.477 MCorrect answer is option 'B'. Can you explain this answer?
Question Description
25.3 g of sodium carbonate, Na2CO3 is dissolved in enough water to make 250 mL ofsolution.If sodium carbonate dissociatescompletely, molar concentration of sodium ions, Na+and carbonate ions CO2-3are respectively(Molar mass of Na2CO3 = 106 g mol-1)a)0.955 M and 1.910 Mb)1.910 M and 0.955 Mc)1.90 M and 1.910Md)0.477 M and 0.477 MCorrect answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about 25.3 g of sodium carbonate, Na2CO3 is dissolved in enough water to make 250 mL ofsolution.If sodium carbonate dissociatescompletely, molar concentration of sodium ions, Na+and carbonate ions CO2-3are respectively(Molar mass of Na2CO3 = 106 g mol-1)a)0.955 M and 1.910 Mb)1.910 M and 0.955 Mc)1.90 M and 1.910Md)0.477 M and 0.477 MCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 25.3 g of sodium carbonate, Na2CO3 is dissolved in enough water to make 250 mL ofsolution.If sodium carbonate dissociatescompletely, molar concentration of sodium ions, Na+and carbonate ions CO2-3are respectively(Molar mass of Na2CO3 = 106 g mol-1)a)0.955 M and 1.910 Mb)1.910 M and 0.955 Mc)1.90 M and 1.910Md)0.477 M and 0.477 MCorrect answer is option 'B'. Can you explain this answer?.
25.3 g of sodium carbonate, Na2CO3 is dissolved in enough water to make 250 mL ofsolution.If sodium carbonate dissociatescompletely, molar concentration of sodium ions, Na+and carbonate ions CO2-3are respectively(Molar mass of Na2CO3 = 106 g mol-1)a)0.955 M and 1.910 Mb)1.910 M and 0.955 Mc)1.90 M and 1.910Md)0.477 M and 0.477 MCorrect answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about 25.3 g of sodium carbonate, Na2CO3 is dissolved in enough water to make 250 mL ofsolution.If sodium carbonate dissociatescompletely, molar concentration of sodium ions, Na+and carbonate ions CO2-3are respectively(Molar mass of Na2CO3 = 106 g mol-1)a)0.955 M and 1.910 Mb)1.910 M and 0.955 Mc)1.90 M and 1.910Md)0.477 M and 0.477 MCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 25.3 g of sodium carbonate, Na2CO3 is dissolved in enough water to make 250 mL ofsolution.If sodium carbonate dissociatescompletely, molar concentration of sodium ions, Na+and carbonate ions CO2-3are respectively(Molar mass of Na2CO3 = 106 g mol-1)a)0.955 M and 1.910 Mb)1.910 M and 0.955 Mc)1.90 M and 1.910Md)0.477 M and 0.477 MCorrect answer is option 'B'. Can you explain this answer?.
Solutions for 25.3 g of sodium carbonate, Na2CO3 is dissolved in enough water to make 250 mL ofsolution.If sodium carbonate dissociatescompletely, molar concentration of sodium ions, Na+and carbonate ions CO2-3are respectively(Molar mass of Na2CO3 = 106 g mol-1)a)0.955 M and 1.910 Mb)1.910 M and 0.955 Mc)1.90 M and 1.910Md)0.477 M and 0.477 MCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET.
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