Answer to Question #108481 in General Chemistry for Beverlie

Question #108481

What are the concentrations of hydrogen ion and hydroxide ion in household ammonia, an aqueous solution of NH3 that has a pH of 11.50?
1. What is the concentration of hydroxide ion in household ammonia, an aqueous solution of NH3 that has a pH of 11.50? answer in M
2. What is the concentration of hydrogen ion in household ammonia, an aqueous solution of NH3 that has a pH of 11.50? answer in M

Expert's answer

1. pH= -lg[H⁺]

[H⁺]=10^^-pH=10^-11.5= 3.16 * 10^-12

2.pOH=14 - pH=14-11.5= 2.5

pOH=-lg[OH^-];

[OH^-]=10^-2.5= 3.16*10^-3

Answer: 1. 3.16 * 10^-12 M

2.3.16*10^-3 M