Answer : The mass of sodium hydroxide is, 18 grams
Explanation : Given,
Molarity of sodium hydroxide = 1.8 M = 1.8 mole/L
Molar mass of sodium hydroxide = 40 g/mole
Volume of solution = 250 ml
Molarity : It is defined as the number of moles of solute present in one liter of solution.
In this question, the solute is sodium hydroxide.
Formula used :
[tex]Molarity=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{volume of solution in ml}}[/tex]
Now put all the given values in this formula, we get the mass of sodium hydroxide.
[tex]1.8mole/L=\frac{\text{Mass of solute}\times 1000}{40g/mole\times 250ml}[/tex]
[tex]\text{Mass of solute}=18g[/tex]
Therefore, the mass of sodium hydroxide is, 18 grams
