User:Mary Mendoza/Notebook/CHEM 571 Experimental Biological Chemistry I/2012/11/13: Difference between revisions

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* A weight of 0.6702 g of sodium phosphate dibasic was dissolved in 50 mL of water to obtain a molarity of 0.05 M. The pH of the solution was adjusted to pH 7.4.
* A weight of 0.6702 g of sodium phosphate dibasic was dissolved in 50 mL of water to obtain a molarity of 0.05 M. The pH of the solution was adjusted to pH 7.4.


.050 L of water × <math>\frac{0.05 mol}{1L}</math> = .0025 mol of Na<sub>2</sub>HPO<sub>4</sub> ×  
.050 L of water × <math>\frac{0.05 mol}{1L}</math> = .0025 mol of Na<sub>2</sub>HPO<sub>4</sub> × <math>\frac{268.07 g}{1 mol}</math> = 0.6702 g





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  • A weight of 0.6702 g of sodium phosphate dibasic was dissolved in 50 mL of water to obtain a molarity of 0.05 M. The pH of the solution was adjusted to pH 7.4.

.050 L of water × [math]\displaystyle{ \frac{0.05 mol}{1L} }[/math] = .0025 mol of Na2HPO4 × [math]\displaystyle{ \frac{268.07 g}{1 mol} }[/math] = 0.6702 g