1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
VladimirAG [237]
3 years ago
10

500.0 ml of 0.110 m naoh is added to 535 ml of 0.250 m weak acid (ka = 6.37 × 10-5. what is the ph of the resulting buffer?

Chemistry
1 answer:
sattari [20]3 years ago
7 0
The main formulas are <span>pH=pKa + log(Base/Acid) and pKa = </span><span>-log(Ka)
so firstly, we must find the value of pKa,
Ka=6.37 x 10 ^-5, and then logKa= log (6.37 . 10^-5)= -9.66, so -logKa= +9.66=Ka
next let's find  </span><span>log(Base/Acid)
for that the concentration of NaOH is [NaOH] = </span><span>500.0  x 0.110  / 500+535 =0.053M, the concentration of the Acid is  [Acid] =535*0.25 / </span><span>500+535 =0.12M, so its difference is </span><span><span>[Acid]-</span>[NaOH] = 0.12-0.053=0.07
so pH=</span><span><span>pKa + log(Base/Acid)= 9.66 + log(0.053 / 0.07)= 9.66-0.36=9.29</span> </span>
so pH=9.29.





You might be interested in
Answer each of the following questions with increases, decreases, or does not change.
Nitella [24]

Answer:

a) increases

b) decreases

c) does not change

d) increases

Explanation:

The vapour pressure of a liquid is dependent on;

I) the magnitude of intermolecular forces

II) the temperature of the liquid

Hence, when any of these increases, the vapour pressure increases likewise.

Similarly, the boiling point of a liquid depends on the magnitude of intermolecular forces present because as intermolecular forces increases, more energy is required to break intermolecular bonds.

Lastly, increase in surface area of a liquid does not really affect it's vapour pressure.

7 0
3 years ago
Which of the following compounds has the general formula X3Y2?Which of the following compounds has the general formula X3Y2?
prisoha [69]

There are no above options to choose from so I am giving an example of a X3Y2 formula which is Magnesium nitride, the formula is Mg3N2.

6 0
2 years ago
Explain what is wrong with the following structure.
Lelu [443]

Answer:

oxygen should be the central atom in the middle

Explanation:

hydrogens always go on the outside

6 0
2 years ago
Read 2 more answers
What element is likely to form an ionic compound with chlorine?
kirill [66]
Sodium (NA)
the sodium atom is donating its 1 valence electron to the chlorine atom. This creates a sodium cation and a chlorine anion. Notice that the net charge of the resulting compound is 0.

5 0
3 years ago
Consider the following voltaic cell:(j) In which direction do anions within the salt bridge move to maintain charge neutrality?
aniked [119]

In order to maintain neutrality, the negatively charged ions in the salt bridge will migrate into the anodic half-cell. A similar (but reversed) situation is found in the cathodic cell.

<h3>What purpose does a salt bridge serve in an oxidation process?</h3>

Anions (negatively charged particles) are added to the solution of the oxidation half of the cell by the salt bridge, and cations (positively charged particles) are added to the solution of the reduction half of the reaction. 

<h3>What purpose does the salt bridge serve in a galvanic cell?</h3>

For instance, KCl, AgNO3, etc. In a galvanic cell, such as a voltaic cell or Daniel cell, salt bridges are typically used. A salt bridge's primary job is to assist in preserving the electrical neutrality of the internal circuit. Additionally, it aids in keeping the cell's response from reaching equilibrium.

Learn more about Salt bridge here:-

brainly.com/question/20345420

#SPJ4

7 0
1 year ago
Other questions:
  • What is the pressure exerted by 3.00 mol of ar gas with a volume of 50.0 l at 25.0ºc (298.2 k)?
    11·1 answer
  • Trace the process of water treatment.
    13·2 answers
  • How many moles of h2so4 is produced from 12.5 moles of so2?
    6·1 answer
  • A 10.00 mL sample of vinegar (an aqueous solution of acetic acid) is titrated with 0.5062 M NaOH(aq) and 16.58 mL is required to
    15·1 answer
  • CO2, NaCI, and HCI may all be classified as...
    10·2 answers
  • ¿Cuáles son las grasas e hidróxidos más efectivos en la elaboración de jabón?
    14·1 answer
  • Can someone please help me
    6·1 answer
  • How many electrons can the n = 4 shell hold?
    6·2 answers
  • What is the mass in grams of 2.21 mole of Ca3(PO4)4?
    8·1 answer
  • what bodyy system Filters waste materials (esp. nitrogenous wastes) from blood; maintain water, salt, acid/base, &amp; ion balan
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!