Question

help please. A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 550mL of a solution that has a concentration of Na+ ions of 0.500M ?

Answer 1

Well, you know you have 0.500M of Na\(^+\),
\(\sf \color{red}{NOTE}\): M = \(\sf \color{purple}{\frac{mol}{L}}\)
if you multiply that by x 0.55 L = ______ mol
Now, use the mols that you found out to figure out the mols of sodium (HINT: 3)
Finally, to get the amount of grams, just multiply molar mass to cancel out the units and get mass