Answer:
pH is 0.30
Explanation:
Given:
m=15.7 g NaOH
V=750ml⇒0.75 L
Required:
pH
Solution:
First solve for the Molarity which is moles of solute divided by the liters of solution
~moles of NaOH~
given mass of solutes × molar mass of solute=moles of solute
15.7g NaOH × [tex]\frac{1 mol NaOH}{40g NaOH}[/tex]= 0.4mol NaOH
Molarity =[tex]\frac{moles of solute}{liters of solution}[/tex] =[tex]\frac{0.4mol}{.75L}[/tex]= 0.5
pH= -log[[tex]H_{3} O^{+}[/tex]]
ph= -log[0.5]
pH=0.30
