A 25 milliliter sample of HNO2 (aq) is neutralized by 32.1 milliliters of 0.150 M KOH (aq). What is the concentration of the acid

We would normally us Normality instead of Molarity for a titration equivalency calculation, but because both are monoprotic the values for N and M are the same.

25.0

m

L

H

N

O

3

⋅

?

M

H

N

O

3

=

32.1

m

L

K

O

H

⋅

0.150

M

K

O

H

?

M

H

N

O

3

=

32.1

m

L

K

O

H

⋅

0.150

M

K

O

H

25.0

m

L

H

N

O

3

M

H

N

O

3

=

0.1926