Question #ca771

1 Answer
May 24, 2017

Answer:

pH = 11.87

Explanation:

We know if we have a given #[OH^(-)]#, then we can find #"pOH"#which is just the #"-log of the" [OH^(-)].#

Find #"pOH"#

  • #-log[OH^(-)]->-log[7.5 * 10^-3 M]->2.13#

#color(white)(aaa)#

We also know from the relationship that

#color(white)(aaaaaa)color(green)("pH+pOH = 14 at "25^@"Celsius"#

so from the #"pOH"# we can find the #"pH"#.

#color(white)(aaa)#

Find #"pH"# from #"pOH"#

  • #"pH+pOH = 14"#

  • #"pH =14-2.13"#

  • #"pH = 11.87"#

Answer: pH = 11.87