Question
A 0.540 M Nitrous Acid (HNO2) solution has been mixed with 0.050 M NaCl. What will...
A 0.540 M Nitrous Acid (HNO2) solution has been mixed with 0.050 M NaCl. What will be the hydronium ion concentration of this solution? The activity coefficients for H3O+ and NO2− are 0.86 and 0.80 respectively. The Ka for Nitrous Acid is 5.10000E-4.
Homework Answers
Answer #1
NaCl + HNO2 
NaNO2 + HCl
The ionic equation is
Na+(aq) + Cl-(aq) + HNO2(aq)
Na+(aq) + NO2-(aq) +
H+(aq) + Cl-(aq)
The net ionic equation is
HNO2(aq)
H+(aq) +
NO2-(aq)
[H+] = [H3O+]
Ka = [NO2-][H3O+]/[HNO2]
5.1 
10-4
= (0.80)[H3O+]/(0.540)
[H3O+] = 3.44
10-4 M
Not the answer you're looking for?
Similar Questions
nitrous acid, HNO2, has a Ka of 7.1 x 10^-4. What are [H3O+], [NO2-], and [OH-]...
nitrous acid, HNO2, has a Ka of 7.1 x 10^-4. What are [H3O+],
[NO2-], and [OH-] in 0.60 M HNO2?
Calculate the pH of a 0.375 M aqueous solution of nitrous acid (HNO2, Ka = 4.5×10-4)...
Calculate the pH of a 0.375 M aqueous solution
of nitrous acid (HNO2,
Ka = 4.5×10-4) and the
equilibrium concentrations of the weak acid and its conjugate
base.
pH
=
[HNO2 ]equilibrium
=
M
[NO2-
]equilibrium
=
M
To a 1.00 L buffer solution made of 1.65 M nitrous acid (HNO2) and 1.01M potassium...
To a 1.00 L buffer solution made of 1.65 M nitrous acid (HNO2)
and 1.01M potassium nitrite (KNO2) was added 0.625 moles of NaOH
(assume no volume change to the solution). What is the final pH of
this buffer assuming Ka nitrous acid = 4.00e-4
a) What is the percent dissociation of a 0.45 M solution of nitrous acid? b) What...
a) What is the percent dissociation of a 0.45 M solution of
nitrous acid?
b) What is the present dissociation of a 0.28 M solution of
methylmine?
c)0.0950 M soution of acetic acid is 1.4% dissociated.
Calculated concentration of three species present in this solution:
hydronium ion, acetic acid, and acetate ion(not H2O or OH-):
d)what is present dissociation of a 0.35 M solution of
hydrobromic acid?
Calculate the pH of a solution that is 0.322 M in nitrous acid (HNO2) and 0.178...
Calculate the pH of a solution that is 0.322 M in nitrous acid
(HNO2) and 0.178 M in potassium nitrite
(KNO2). The acid dissociation constant of nitrous acid
is 4.50 × 10-4.
What is the pH of a 0.0520 M solution of nitrous acid (HNO2)? (Ka = 4.5...
What is the pH of a 0.0520 M solution of nitrous acid (HNO2)?
(Ka = 4.5 x 10-4) (Hint: use ICE and solve the quadratic equation)
OR something A LOT simple PLEASE Question options: a) pH = 2.34 b)
pH = 2.32 c) pH = 2.30 d) pH =
2.36
1. A 1.00 liter solution contains 0.41 M nitrous acid and 0.53 M sodium nitrite. If...
1.
A 1.00 liter solution contains 0.41 M
nitrous acid and 0.53 M
sodium nitrite.
If 0.130 moles of calcium
hydroxide are added to this system, indicate whether the
following statements are true or false.
(Assume that the volume does not change upon the addition of
calcium hydroxide.)
_______TrueFalseA. The number of moles of
HNO2 will remain the
same.
_______TrueFalseB. The number of moles of
NO2- will remain the
same.
_______TrueFalseC. The equilibrium
concentration of H3O+ will remain the
same....
For the nitrous acid, HNO2, Ka= 4.0 x 10^-4. Calculate the ph of 0.27 M HNO2
For
the nitrous acid, HNO2, Ka= 4.0 x 10^-4. Calculate the ph of 0.27 M
HNO2
You are dealing with the chemicals nitrous acid (HNO2) and sodium nitrite (NaNO2). Nitrous acid has...
You are dealing with the chemicals nitrous acid
(HNO2) and sodium nitrite (NaNO2). Nitrous
acid has a pKa of 3.398 and a Ka of 4.00 x
10-4
a) Could mixing the “ right amounts ” of nitrous acid with
sodium nitrite together in water create a buffer solution ? Briefly
explain, including what it means to have the “ right amounts ".
b) What would be the effective pH range of this buffer?
c) Instead of using a compound containing...
1)consider a 1.50 M solution of nitrous acid,HNO2 (ka=6.0*10^-4) what is molarity of H^+? what is...
1)consider a 1.50 M solution of nitrous acid,HNO2 (ka=6.0*10^-4)
what is molarity of H^+?
what is the PH?
2) indiacte speices if its an acid or base?
NH3
+h20
...>
<.... NH4+
+OH
C7H502H
+c6h5nh2
C75O2^-
+C6H5NH3^+
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 2 minutes ago
asked 15 minutes ago
asked 23 minutes ago
asked 35 minutes ago
asked 38 minutes ago
asked 39 minutes ago
asked 43 minutes ago
asked 48 minutes ago
asked 53 minutes ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago