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bmlevac
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1. Homework Statement
I have a solution containing both mono basic (480mg/ml) and dibasic (180mg/ml) sodium phosphate. How do I determine the total mass of phosphorus per ml of the entire solution?
2. Homework Equations
?
3. The Attempt at a Solution
Monobasic sodium phosphate (MSP):
(480mg/mL)/(119.98mg/mmol)=4 mmol/mL
Phosphorus in MSP: (30.974 mg/mmol)(4 mmol/mL)=123.90 mg/mL
Dibasic sodium phosphate (DSP)
(180 mg/mL)/(141.96mg/mmol)=1.268 mmol/mL
Phosphorus in DSP: (30.97 mg/mmol)(1.268 mmol/mL)=39.28 mg/mL
Total elemental phosphorus = 123.90+39.28=163.18 mg/mL
However, this answer is not correct. Apparently, the correct answer is 124.36 mg/mL
I have a solution containing both mono basic (480mg/ml) and dibasic (180mg/ml) sodium phosphate. How do I determine the total mass of phosphorus per ml of the entire solution?
2. Homework Equations
?
3. The Attempt at a Solution
Monobasic sodium phosphate (MSP):
(480mg/mL)/(119.98mg/mmol)=4 mmol/mL
Phosphorus in MSP: (30.974 mg/mmol)(4 mmol/mL)=123.90 mg/mL
Dibasic sodium phosphate (DSP)
(180 mg/mL)/(141.96mg/mmol)=1.268 mmol/mL
Phosphorus in DSP: (30.97 mg/mmol)(1.268 mmol/mL)=39.28 mg/mL
Total elemental phosphorus = 123.90+39.28=163.18 mg/mL
However, this answer is not correct. Apparently, the correct answer is 124.36 mg/mL