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
s2008m [1.1K]
3 years ago
9

A 0.552-g sample of ascorbic acid (vitamin C) was dissolved in water to a total volume of 20.0 mL and titrated with 0.1103 M KOH

. The equivalence point occurred at 28.42 mL. The pH of the solution at 10.0 mL of added base was 3.72. From this data, determine the molar mass and K, for vitamin C.
Chemistry
1 answer:
Tanzania [10]3 years ago
4 0

Answer:

176.36g/mol

Explanation:

It was given that:

Mass of ascorbic acid=0.552 g

Volume of water=20.0 mL

Concentration of KOH=0.1103 M

Volume of KOH=28.42 mL. = 0.02842l

pH of solution at 10.0 mL= 3.72

At equivalence point, number of moles of acid is equal to the number of moles of base.

Number of moles of base= (KOH) x Volume

                        =0.1103 x 0.02842 L

                                =0.00313 moles.

Therefore number of miles of acid= 0.00313moles

No of moles= Mass/molar mass

Molar Mass= Mass of Acid/ No of moles of acid

= 0.552g/0.00312moles

= 176.36g/mol

You might be interested in
PLEASE HELP ASAP!
egoroff_w [7]

Answer:

Lithium fluoride i think but I am not really sure

But it should be Lithium fluoride

Explanation: that's because neighter boron nor nitrogen contains water

3 0
3 years ago
What is the term for an object's strength of motion?
Andrei [34K]

I'm pretty sure its momentum

3 0
3 years ago
The overall long-term effects of air pollution are not yet certain.<br><br> True<br> False
Viktor [21]
I’m pretty positive the answer is True
6 0
3 years ago
Read 2 more answers
Which group on the periodic table is the most reactive
Lostsunrise [7]

Answer:

Group 7 or the Halogens

Explanation:

The halogens occupies the 7th group on the periodic table. The group is made of F, Cl , Br, I and At.

The elements in this group are the most reactive of all elements. They are very reactive because they have just 7 electrons in their outermost shell and they only require an electron to complete their electronic configuration to produce an octet which typically mimics the stable group VIII elements.

This makes them very highly reactive.

7 0
4 years ago
Read 2 more answers
What happens when gasoline is used to power a vehicle?
Romashka [77]
The answer should be A. Because the energy in gasoline is called chemical. When burned it is heat, Then to power a vehicle, it is mechanical energy. But I don't know whether the question wants to mean that the energy in the gasoline will not convert totally to the heat, so it will lose. But if think like this, when heat energy transform to mechanical, it will lose again. So I think the answer is A.
3 0
3 years ago
Other questions:
  • What type of chemical reaction is NH3
    14·1 answer
  • Im the only noble gas with 2 electrons
    10·2 answers
  • When the valve between the two containers is opened and the gases allowed to mix, how does the volume occupied by the n2 gas cha
    11·2 answers
  • Help me please fast​
    11·1 answer
  • How can we remove the hardness of water by boiling?​
    10·1 answer
  • Cdvshduejsnxhhwjxhxh ydujdbxg
    7·2 answers
  • 5. A vitamin contains 1.5 x 10' grams of zinc. How many moles of zinc are in the vitamin?
    14·1 answer
  • How much energy is required to melt 76.941g of ice
    6·1 answer
  • Which statements best describe half-lives of radioactive isotopes? Check all that apply.
    5·2 answers
  • Many organisms on Earth exhibit similar ____________.
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!