Question

- Preparation of NaPO4 solution (So): A solution (So) of sodium phosphate is to be prepared of molar concentration 0.1 mol/L. mL. 100 Given M(Na3PO)=164 g/mol. and a volume 1.1- Calculate the mass of sodium phosphate needed to prepare this solution. Deduce its mass concentration (Cm). 1.2 - Write the materials and glassware needed. 1.3- Write the equation of dissolution of sodium phosphate. 1.4- Determine the molar concentration of Na ions in this solution​

Answer 1

Step-by-step explanation:

1.1 we have to find mass of Na3PO4;

for that we have to Calculate the moles of Na3PO4 needed:

volume is 100mL = 0.1L

Molar concentration = Moles of solute / Volume of solution in L

0.1 mol/L = Moles of Na3PO4 / 0.1 L

Moles of Na3PO4 = 0.1 mol/L * 0.1 L

Moles of Na3PO4 = 0.01 mol

Now, Calculate the mass of Na3PO4 needed:

so, Mass = Moles of Na3PO4 * Molar mass of Na3PO4

Mass = 0.01 mol * 164 g/mol

Mass = 1.64 g of Na3PO4.

1.2 materials and glassware needed:

1.64 g Sodium phosphate (Na3PO4)

100 mL volumetric flask

weighing balance

Distilled water

Glass rod

Pipette and burette