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
MissTica
3 years ago
12

Concentrated hydrochloric acid is a solution that is 37.5% mass per unit volume HCl(aq) in water. An old bottle of HCl has an un

known concentration. What is the concentration of hydrochloric acid, [HCl], in the old bottle, if 9.95 mL of 12.0 M NaOH(aq) is required to reach the equivalence point when added to 15 mL of acid?What is the concentration of HCl(aq)?
Chemistry
1 answer:
Alex787 [66]3 years ago
4 0

Answer:

M_{HCl}=7.96M

Explanation:

Hello,

In this case, since the neutralization reaction between HCl and NaOH is:

HCl+NaOH\rightarrow NaCl+H_2O

We notice a 1:1 molar ratio, for that reason, at the equivalence point we find:

n_{HCl}=n_{NaOH}

Thus in terms in molarities one could compute the concentration of HCl in the old bottle for the used NaOH for the neutralization as:

M_{HCl}V_{HCl}=M_{NaOH}V_{NaOH}\\\\M_{HCl}=\frac{M_{NaOH}V_{NaOH}}{V_{HCl}} =\frac{12.0M*9.95mL}{15mL}\\ \\M_{HCl}=7.96M

This value is lower than 37% HCl that in molarity is about 12 M, such difference is due to its high volatility.

Best regards.

You might be interested in
Where are metals, nonmetals, metalloids, and the noble gases located on the periodic table?
Fofino [41]
Metals are on the left side of the table and nonmetals are on the left with metalloids between them. And the noble gases are all in group 18 of the periodic table.
6 0
3 years ago
What is wrong with this chemical<br> equation - N2 + O2 → 2N20,
LUCKY_DIMON [66]

Answer and Explanation:

I think the thing that is wrong with this chemical equation is that there is 0 by the 2 instead of the letter O.

Other than that, everything would be balanced.

<em><u>#teamtrees #PAW (Plant And Water)</u></em>

5 0
2 years ago
Read 2 more answers
What molecule is needed to digest milk?
xxMikexx [17]

Answer:

For example, the sugar found in milk is called lactose. With the aid of the enzyme, lactase, the substrate, lactose, is broken down into two products, glucose and galactose. People who don't make enough lactase have trouble digesting milk products and are lactose intolerant.

4 0
2 years ago
The antibiotic prontosil, developed by bayer pharmaceuticals in 1932, was used in saving the life of president roosevelt's son f
Alja [10]

Prontosil is a compound produced by the coupled reaction of an aryldiazonium ion and an aromatic compound.

<h3>What are diazonium compounds?</h3>

These are organic compounds in which there are ionic interactions between the azo group (-N₂⁺) and an anion X⁻.

The general structure is RN₂⁺X⁻.

  • R is the lateral chain that might be an aromatic ring, among other options.
  • N₂⁺ is the azo group
  • X⁻ is the anion

The azo group characterizes as being unstable and reactive. This property is because one of the N atoms has a positive charge.

-N⁺≡ N

<h3>What is the coupling reaction of aryldiazonium compounds?</h3>

Aryldiazonium salt reactions can occur in two ways,

  • Substitution reactions
  • Coupling reactions

Coupling reactions are the aromatic electrophilic substitution, where the aryldiazonium ion acts as an electrophile for an activated aromatic compound to attack it.

The coupling reaction occurs at the azo group level.

In the exposed example,

  • the benzene ring with sulfur bonded to oxygen atoms is the coupling component
  • the benzene ring with NH₂ and the azo group is the diazonium ion

In the attached files you will find the drawings.

You can learn more about diazonium compounds at

brainly.com/question/9061271

brainly.com/question/9389852

brainly.com/question/13147442

5 0
2 years ago
How many molecules are in 8.2 moles of CO3
Anarel [89]
I believe the answer is 50.5 molecules 
3 0
2 years ago
Other questions:
  • Which acid was most likely used for the titration graph below.
    14·2 answers
  • What will the final volume of a gas be if it is heated from 9 K to 117 K, and the initial volume is 85.5 L?
    12·1 answer
  • Nitrogen (N) is much more electronegative than hydrogen (H). Which of the following statements is correct about the atoms in amm
    7·1 answer
  • Why do people use block and teckle systems to move heavy objects?
    12·1 answer
  • Write out the balanced equation for the following word equation. Use the proper state abbreviations for each of the reactants an
    6·1 answer
  • Electrophiles for the electrophilic aromatic substitution reactions have to be very strong to react with the stable aromatic rin
    5·1 answer
  • A sample of 25mls of HCL was mixed with 25mls of KOH of the same concentration in a calorimeter. As a result the temperature ros
    12·1 answer
  • density of a piece of ebony wood is 1.174 g/ml. what is the volume in quarts of a 2.1549 lb piece of this ebony wood?
    15·1 answer
  • Choose which of the following are organic. (check all that apply) *
    10·1 answer
  • Does the pH increase or decrease, and does it do so to a large or small extent, with each of the following additions?(c) 5 drops
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!