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
DerKrebs [107]
3 years ago
7

When a 18.0 mL sample of a 0.308 M aqueous hydrofluoric acid solution is titrated with a 0.361 M aqueous sodium hydroxide soluti

on, what is the pH after 23.0 mL of sodium hydroxide have been added?
Chemistry
1 answer:
sleet_krkn [62]3 years ago
4 0

Answer:

pH = 12.8

Explanation:

HF + NaOH → F⁻ + Na⁺ + H₂O

<em>1 mole of HF reacts with 1 mole of NaOH</em>

<em />

Initial moles of HF and NaOH are:

HF = 0.018L × (0.308mol / L) = 5.544x10⁻³mol HF

NaOH = 0.023L × (0.361mol / L) = 8.303x10⁻³mol NaOH

That means moles of NaOH remains after reaction are:

8.303x10⁻³mol - 5.544x10⁻³mol = <em>2.759x10⁻³moles NaOH</em>

Total volume is 18.0mL + 23.0mL = 41.0mL = 0.0410L

Molar concentration of NaOH is

2.759x10⁻³moles NaOH / 0.0410L = 0.0673M = [OH⁻]

pOH = - log [OH⁻] = 1.17

As pH = 14 - pOH

<em>pH = 12.8</em>

<em></em>

You might be interested in
Is the bond formed between each pair of atoms pure covalent (a.k.a. nonpolar covalent), polar covalent, or ionic?
swat32

Answer:

So, look up for electronegativity table

There's a continuum for deciding whether the bond is non-polar, polar, or ionic

If electronegativity difference is less than 0.4 it's non-polar

Explanation:

Pls vote my answer as brainliest

7 0
3 years ago
Which is the best term to use when describing the energy of motion? chemical kinetic potential thermal
finlep [7]
By considering the aforementioned facts, kinetic energy is the suitable term to describe the energy of motion.
8 0
3 years ago
Read 2 more answers
5 points
ElenaW [278]

Answer:

I'm purty sure it's 10% Cause that is what my teach said.

Explanation:

Have a good day fern!!!!

4 0
3 years ago
Read 2 more answers
Some baker of sourdough and a few other types of bread have what they call “starter dough”. This dough contains yeast from which
andre [41]


Fresh sourdough starter is a wonderful resource. Bread, pancakes, waffles, cake… there are so many delicious directions you can take with sourdough. The key: maintaining your sourdough starter so that it’s healthy, happy, and ready to go when you are almost there! Once you’ve successfully created your starter, you’ll need to feed it regularly. If you bake a lot of sourdough treats, you may want to keep it on your counter, at room temperature. While this means feeding it twice a day, it also means your starter will be ready to bake with at the drop of a hat! However, many of us don’t want the commitment of twice-a-day feedings. If you’re a more casual sourdough baker, it’s possible to store your starter in the refrigerator, feeding it just once a week.

5 0
3 years ago
What happens if excess carbon dioxide is not removed from the atmosphere?
IceJOKER [234]

Answer:

Carbon dioxide becomes a poisonous gas when there is too much of it in the air you breathe. Besides the effects it can have on the planet and the atmosphere, carbon dioxide poisoning can lead to central nervous system damage and respiratory deterioration in humans and other breathing creatures.

7 0
3 years ago
Read 2 more answers
Other questions:
  • Which substance contains a bond with the greatest ionic character?
    12·1 answer
  • Is this the correct Lewis Dot Structure for SO2??<br><br>PLEASE HELP
    7·1 answer
  • Of the elements calcium, Ca, beryllium, Be, barium, Ba, and strontium, Sr, which has the largest atomic radius? Explain your ans
    5·2 answers
  • A gold nugget has a volume of 20.0 cm3 and its density is 19.3 g/cm3. What is the mass of the gold nugget?
    13·2 answers
  • Where does most of the mass of an atom come from?
    7·1 answer
  • How did the elements begin to stratify?
    12·1 answer
  • A long ton is defined as exactly 2240 Ib. What is this mass in kilograms?
    5·2 answers
  • If the atomic mass is 14 and the atomic number is 7,how many neutrons do you have?​
    7·1 answer
  • :answer question number 3
    12·1 answer
  • Lithium metal reacts with nitrogen gas to form lithium nitride. identify the balanced reaction that describes this process
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!