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
lukranit [14]
3 years ago
15

Why must the ph ammonia buffer solution be stored and dispensed in the fume exhaust hood?

Chemistry
1 answer:
Vadim26 [7]3 years ago
7 0

On the other hand ammonia is a very dangerous chemical which has a pungent smell and effect the eyes of the user. Thus it kept always in the fume exhaust hood for storing and dispensing function.  

The  pH of ammonia buffer contains ammonium hydroxide (NH₄OH) and a salt of ammonia with a  strong acid like (HCl) which produces, ammonium chloride (NH₄Cl) mixture. The evaporation rate of ammonia is so high at room temperature thus on opening of the buffer solution the ammonia get evaporated very fast and the concentration of ammonia decreases which affect the pH of the buffer solution.

Thus the reason to put ammonia buffer in fume hood is explained.


You might be interested in
Is it physical change or chemical change when you smooth a wood chair with sandpaper?
White raven [17]
It should be a chemical change
8 0
2 years ago
Van dar waals are the dominant molecular force in the sodium chloride. ​
Vedmedyk [2.9K]

Answer:

Recall the two conceptual steps necessary to dissolve a solute and form a solution

Key Points

There are two conceptual steps to form a solution, each corresponding to one of the two opposing forces that dictate solubility.

The first conceptual step is dissolution, which corresponds to the force of the solvent-solvent and solute-solute intermolecular attractions that needs to be broken down.

The second conceptual step is solvation, which corresponds to the force of the solute-solvent intermolecular attraction that needs to be formed in order to form a solution.

Many intermolecular forces can contribute to solvation, including hydrogen bonding, dipole-dipole forces, Van Der Waals forces, and ion-dipole interactions.

Term

intermolecular forcesattractive and repulsive forces between molecules

The strength of the intermolecular forces between solutes and solvents determines the solubility of a given solute in a given solvent. In order to form a solution, the solute must be surrounded, or solvated, by the solvent. Solutes successfully dissolve into solvents when solute-solvent bonds are stronger than either solute-solute bonds or solvent-solvent bonds.

Qualitatively, one can determine the solubility of a solute in a solvent by using the rule “like dissolves like”. In general, solutes whose polarity matches that of the solvent will generally be soluble. For example, table salt (NaCl) dissolves easily into water (H2O) because both molecules are polar.

Intermolecular Forces and Their Importance in Solution Formation

There are two conceptual steps to form a solution, each corresponding to one of the two opposing forces that dictate solubility. If the solute is a solid or liquid, it must first be dispersed — that is, its molecular units must be pulled apart. This requires energy, and so this step always works against solution formation (always endothermic, or requires that energy be put into the system).

<em>#</em><em>p</em><em>a</em><em> </em><em>f</em><em>o</em><em>l</em><em>l</em><em>o</em><em>w</em><em> </em><em>a</em><em>n</em><em>d</em><em> </em><em>h</em><em>e</em><em>a</em><em>r</em><em>t</em><em> </em><em>p</em><em>o</em><em> </em><em>p</em><em>a</em><em>r</em><em>a</em><em> </em><em>s</em><em>a</em><em> </em><em>i</em><em>b</em><em>a</em><em> </em><em>p</em><em>a</em><em>n</em><em>g</em><em> </em><em>answer</em><em> </em><em>a</em><em>t</em><em> </em><em>p</em><em>a</em><em> </em><em>b</em><em>r</em><em>a</em><em>i</em><em>n</em><em>l</em><em>e</em><em>s</em><em>t</em><em> </em><em>a</em><em>n</em><em>s</em><em>w</em><em>e</em><em>r</em><em> </em><em>n</em><em>a</em><em> </em><em>d</em><em>e</em><em>n</em>

7 0
3 years ago
True or False? <br><br> A day is about 12 hours long
7nadin3 [17]

Answer:

false it's 24 hours long.

7 0
2 years ago
2. What is the smallest unit of an organism that is classified as living? *
Leviafan [203]

Answer:

D

Explanation:

The cell is the basic structural, functional and biological unit of all known living organisms. Cells are the smallest unit of life that is classified as a living thing, and are often called the "building blocks of life.

4 0
3 years ago
Read 2 more answers
Exactly one mole of an ideal gas is contained in a 2.00 liter container at 1,000 K. What is the pressure exerted by this gas?
Kipish [7]
pV = nRT

p = nRT/V 

p= 1 x 0.08205 x 1000/ 2

p = 41.025 Pa  

Edit: The unit should be atm instead of Pa, as pointed out by a nice human being.
4 0
3 years ago
Read 2 more answers
Other questions:
  • Two chemical reactions are shown:
    13·1 answer
  • ..
    13·2 answers
  • Which of the following sets are isoelectronic (i.e., have the same number of electrons)? i. Br-, Kr, Sr2+ ii. C, N-, O2- iii. Mg
    8·1 answer
  • What is a heterogenous mixture?
    5·1 answer
  • What is the molality of a solution in which 0.300 moles of solute is dissolved in 1500. g of solvent?
    6·1 answer
  • Questions 25,26 28, 29
    15·2 answers
  • Trisha and her lab partner were conducting a variety of experiments to produce gases: hydrogen, oxygen, and carbon dioxide. In o
    12·1 answer
  • What process takes place when hydrogen-3 and hydrogen-2 combine to form
    8·1 answer
  • How are a mole and a dozen similar?
    8·1 answer
  • Is aliphatic alcohol hydroxy derivative??​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!