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
DochEvi [55]
3 years ago
10

0.5 gm of mixture of NH4Cl and NaCl was boiled with 25 ml of 0.95 N NaOH in a vessel till all the ammonia is expelled.The residu

al solution is cooled and then made up to 100 ml.It was found that 10 ml of the diluted residual solution neutralised by 16 ml of 0.1 N (F=1.06)H2SO4. Calculate the % of pure NH4Cl in the mixture.
Ans:72.66%​
Chemistry
1 answer:
GalinKa [24]3 years ago
8 0

Answer:

72.66%

Explanation:

NH₄Cl reacts in presence of NaOH producing ammonia, NH₃, as follows:

NH₄Cl + NaOH → NaCl + NH₃ + H₂O

The residual NaOH reacts with H₂SO₄ as follows:

2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂O.

The equivalent-gram of H₂SO₄ are:

16mL * 0.1N * 1.06 = 1.696mEq.

As the complete residual solution is 100mL but the neutralization was made only with 10mL, the mEq you need to neutralize the residual NaOH is:

1.696mEq * (100mL / 10mL) = 16.96mEq.

The mEq of NaOH you add in the first are:

25mL * 0.95mEq = 23.75mEq

That means the NaOH that reacts = moles of NH₄Cl is:

23.75mEq - 16.96mEq = 6.79mEq = 6.79mmoles NH₄Cl =

6.79x10⁻³ moles NH₄Cl

In grams (Using molar mass NH₄Cl = 53.5g/mol):

6.79x10⁻³ moles NH₄Cl * (53.5g / mol) =

0.3633g of NH₄Cl are in the original mixture.

% is:

0.3633g/ 0.5g * 100 = 72.66%

You might be interested in
An important industrial route to extremely pure acetic acid is the reaction of methanol with carbon monoxide:
Nastasia [14]

The reaction has had a heat that is enthalpy of -22 kJ/mol. The exothermic process has been signaled by the negative sign.

The amount of energy that the system absorbs or releases to create the products is described as the heat of reaction.

The source of the reaction's heat is

H is equal to 3(413 Kj/mol) + 358 Kj/mol + 467 Kj/mol + 1070 Kj/mol = 3134 Kj/mol.

H prod equals 3(413 kj/mol) plus 347 kj/mol plus 358 kj/mol plus 467 kj/mol plus 745 kj/mol, or 3156 kj/mol.

H=3134 kj/mol - 3156 kj/mol = -22 Kj/mol

Negative findings point to an exothermic response.

A chemical process known as an exothermic reaction releases energy in the form of heat or light.

Learn more about exothermic reaction here-

brainly.com/question/10373907

#SPJ4

7 0
1 year ago
20 POINTS!!!!......
tester [92]
Density= mass/ volume

So density = 99/10= 9.9g/cm^3

Hope this helps!! xx
5 0
3 years ago
Read 2 more answers
A wildfire can destroy thousands of acres of forest. Explain two positive effects and two negative effects that a wildfire can h
Lynna [10]

Explanation:

Wildfires destroy forests that are great carbon sinks. This means that large amount of carbon dioxide are released back into the atmosphere. Carbon dioxide is a greenhouse gas and this will contribute to global warming.

An advantage is that the wildfire will spur secondary ecological succession. This kind of succession improves the biodiversity of the forest. Biodiversity improves the productivity of the ecosystem.

Learn More:

For more on secondary ecological succession check out;

brainly.com/question/2456852

brainly.com/question/13866761

#LearnWithBrainly

5 0
3 years ago
What are 5 reasons to be grateful of your teachers for?
4vir4ik [10]

Answer:

5 reasons to be grateful of your teachers for is

-->They open our minds to new possibilities. ...

-->They work very hard for us. ...

-->They never give up on us. ...

-->They turn our weaknesses into strengths. ...

-->They are our best guides. ...

7 0
3 years ago
Read 2 more answers
Explain what the ecliptic is
AlekseyPX
The Ecliptic is an imaginary line on the sky that marks the annual path of the sun. It is the projection of Earths orbit onto the celestial sphere. The ecliptic is even the starting point for the celestial coordinate system used by astronomers to pinpoint the location of every star, nebula, and galaxy.
7 0
3 years ago
Other questions:
  • Helppppppppppppppppppppp
    12·1 answer
  • What element is used in light bulbs as a filament???? help rly need help
    8·1 answer
  • Ptrpared a solution of sodium chloride (NaCl) by measuring out 49.Umol of sodium chloride into 150. ML. Volumetric flask and fil
    13·1 answer
  • Mercury’s name means ____________.
    14·1 answer
  • If you decreased the volume of a sample of gas by a factor of three while maintaining a constant pressure, how would the absolut
    9·2 answers
  • They dump large amounts of rainwater that causes flooding. *
    10·2 answers
  • How many grams of calcium chloride would be dissolved in 1.0L of a 0.10m solution of calcium chloride?
    7·1 answer
  • In a chemical reaction 88g of CO2 was produced at r.t.p. <br> Calculate the volume of CO2 in dm??
    9·1 answer
  • Decide which element probably forms a compound with chlorine that has a chemical formula most and least similar to the chemical
    7·1 answer
  • What type of rock is this?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!