If a sample of a certain solution is determined to have a [H3O^+] concentration of 4.6*10^-1 moles/liter, what is its pH? Round off your answer to one decimal p

Question

If a sample of a certain solution is determined to have a [H3O^+] concentration of 4.6*10^-1 moles/liter, what is its pH? Round off your answer to one decimal place.

Answer 1

if you know the concentration of the hydronium ion [H₃O⁺] then you can use the following equation to find the pH of the solution.  moles/liter = Molarity.  

 

 

pH = -log [H₃O⁺] 

pH = -log [4.6x10^-1] 

 

the log of [4.6x10^-1]  = -0.337

 

pH = - (-0.337) 

 

pH = 0.337 ≈ 0.3

 

 

so this is a pretty acidic solution