Answer:
The answer is 3.3
Step-by-step explanation:
∵ PH = [tex]-log[H^{+}][/tex]
∵ [tex]H^{+}[/tex] = 5.0 × [tex]10^{-4}[/tex]
∴ PH = [tex]-log[5(10^{-4})]=-log5+-log10^{-4}[/tex]⇒logab = loga + logb
[tex]=-log5-log10^{-4}=-log5-(-4)log10[/tex]⇒[tex]loga^{n}=nloga[/tex]
[tex]=-log5+4log10=-log5+4(1)[/tex]⇒ log10 = 1
[tex]=-log5+4=3.3010[/tex] ≅ 3.3
∴ PH = 3.3
