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
marin [14]
3 years ago
9

A student used 1.168g of an unknown weak acid and titrated it against 28.75 mL of 0.105M NaOH to reach the equivalence point. Wh

at is the molar mass of his unknown acid
Chemistry
1 answer:
Vaselesa [24]3 years ago
3 0

Answer:

The molar mass of the unknown acid is 386.8 g/mol

Explanation:

Step 1: Data given

Mass of the weak acid = 1.168 grams

volume of NaOH = 28.75 mL = 0.02875 L

Molarity of NaOH = 0.105 M

Since we only know 1 equivalence point, we suppose the acid is monoprotic

Step 2: Calculate moles NaOH

Moles NaOH = molarity NaOH * volume NaOH

Moles NaOH = 0.105 M * 0.02875 L

Moles NaOH = 0.00302 moles

We need 0.00302 moles of weak acid to neutralize the NaOH

Step 3: Calculate molar mass of weak acid

Molar mass = mass / moles

Molar mass = 1.168 grams / 0.00302 moles

Molar mass = 386.8 g/mol

The molar mass of the unknown acid is 386.8 g/mol

You might be interested in
3. Where are gastropods found? Choose all the correct answers.
dalvyx [7]
D.

Gastropods live in every conceivable habitat
4 0
2 years ago
Read 2 more answers
Please help 21 points
Novosadov [1.4K]

Answer:

You

Explanation:

Will have to fill in the graph organizer with a story

4 0
2 years ago
The diagram shows four different locations in an atom.
Ainat [17]

Answer:

The answer is 1 and 4.

Explanation:

Mass is most concentrated in the nucelus of an atom. Therefore, if you are looking to find the area with the least mass, go outside of the nucelus. Points one and four are the furthest outside of the nucleus.

5 0
2 years ago
Read 2 more answers
How much heat do you need to raise the temperature of 150 g of ice from -30°C to -15°c?
OLga [1]
To solve this question, you must use the formula: q=mc(change in temperature), where q is heat, m is mass, C is specific heat and temperature change is temperature change. The specific heat for ice is 2.1kJ/Kg x K (given). The change in temperature is 15 degrees Celsius (which you should change to kelvins so you can cancel out units), or 273 + 15 = 288K. The mass is 150 grams, which is 0.15 kg. Now, we can solve for q, heat. We will do this by substituting variables into the formula. After simplifying and cancelling out units, the answer we get is: 90.72kJ.
4 0
3 years ago
Planetesimals are made from <br><br> A. Rock<br><br> B. Gas<br><br> C. Stars<br><br> D. Clouds
White raven [17]
A )rock is correct answer
3 0
2 years ago
Read 2 more answers
Other questions:
  • What is the best classification for this sample of crude oil?
    6·2 answers
  • Which of the following does NOT state what the arrow means in a chemical equation? a. produces b. yields c. forms d. conserves
    5·2 answers
  • which contains the most amount of energy a glass of water at 20C or a glass of water at 80C. EXPLAIN ANSWER
    11·1 answer
  • What is the ionic name for NaIO4?
    7·1 answer
  • A volume of 129 mL of hydrogen is collected over water. The water level in the collecting vessel is the same as the outside leve
    13·1 answer
  • What do you notice about how plants get their energy in a DESERT ECOSYSTEM?
    12·2 answers
  • Calculate the density (in grams per milliliter) of the following gas at 97 °C and 755 mm Hg Sulfur dioxide (SO2)
    5·1 answer
  • Which statement describes solstices?
    13·2 answers
  • How do I find the concentration of hydronium
    13·1 answer
  • WHaty are the Chemical properties of Oxygen?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!