The pK_(ln) of an indicator is 10.5. For which pH transition range is the indicator most suitable ?

The pK_(ln) of an indicator is 10.5. For which pH transition range is

1.	The pK_(ln) of an indicator is 10.5. For which pH transition range is the indicator most suitable ?
Answer» SOLUTION :`pK_(LN)pm1, i.e., 9.5 ` to 11.5 .