pOH of solution = 10
Further explanation
pH is the degree of acidity of a solution that depends on the concentration of H⁺ ions. The greater the value the more acidic the solution and the smaller the pH.
[tex]\large{\boxed{\bold{pH=-log [H^+]}}}[/tex]
pH=-log[H₃O⁺]
[tex]\tt pH=-log[1\times 10^{-4}]\\\\pH=4\\\\pH+pOH=14\\\\pOH=14-4\\\\pOH=10[/tex]
