B. Example Calculations and Problems Sections
1. HNO2 + H2O -> H3O+ + NO2-
Acid: HNO2
Base: H2O
Conjugate Acid: H3O+
Conjugate Base: NO2-
2. What is the concentration of OH- if the H3O+ was 10.0 M?
1.0 x 10^-14=(10.0)(OH)
OH=1.0 x 10^-15
3. log10 (5)=y Find Y y=log(5)
log10(x)=4.50
x=10^4.50
4. pH=-log(H) What is the pH value if H=1.00x10^-9
pH=-log(1.00x10^-9)
5. What is the pH if the pOH was 8?
pH+pOH=14
14-8=pH
pH=6
Acid: HNO2
Base: H2O
Conjugate Acid: H3O+
Conjugate Base: NO2-
2. What is the concentration of OH- if the H3O+ was 10.0 M?
1.0 x 10^-14=(10.0)(OH)
OH=1.0 x 10^-15
3. log10 (5)=y Find Y y=log(5)
log10(x)=4.50
x=10^4.50
4. pH=-log(H) What is the pH value if H=1.00x10^-9
pH=-log(1.00x10^-9)
5. What is the pH if the pOH was 8?
pH+pOH=14
14-8=pH
pH=6