Question

Calculate the [OH−] of each aqueous solution with the following [H3O+]:blood, 4.5×10−8M

Answer 1

Answer

2.22 x 10⁻⁷ M

Procedure

To calculate the [OH⁻] concentration of blood we will consider the following pH formulas

pH=-log [H₃O⁺]

pH+pOH=14

The pH of blood will be

$pH=-\log_{10}[4.5\times10^{-8}M]=7.3467$

Then we do the rest

$pOH=14-7.3467=6.6532$

Lastly, we transform from pOH to concentration

$[OH^-]=10^{-pOH}=10^{-6.6532}=2.22\times10^{-7}$