According to the definition of molarity, 350 mL of a solution with a sodium ion concentration of 0.125 M requires 6.2125 g of Na2SO4 to manufacture.
<h3><u>How to find Molarity ?</u></h3>
The number of moles of a solute that are dissolved in a given volume is what is meant by the definition of molarity, which is a measurement of a solute's concentration.
By dividing the moles of the solute by the volume of the solution, molarity, also known as the molar concentration of a solution, is obtained.
Molarity = No. of moles of solute / Volume
Molarity is expressed in units mole/litre
In this case, you know that:
- molarity= 0.125 M
- number of moles of solute= ?
- volume= 350 mL= 0.350 mL
Replacing in the definition of molarity:
0.125M = No. of moles of solute / 0.350l
Solving:
number of moles of solute= 0.125 M× 0.350 L
number of moles of solute= 0.04375 moles
Being 142 g/mole the molar mass of Na₂SO₄, that is, the mass of one mole of the compound, the amount of mass that contains 0.04375 moles is calculated as:
mass= 0.04375 moles× 142 g/moles
mass= 6.2125 g
In summary, 6.2125 g of Na₂SO₄ is needed to prepare 350 mL of a solution having a sodium ion concentration of 0.125 M.
To view more about concentrations, refer to;
brainly.com/question/10725862
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