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
bija089 [108]
3 years ago
8

Alum is a compound used in a variety of applications including cosmetics, water purification, and as a food additive. It can be

synthesized from aluminum metal, sulfuric acid, water, and potassium hydroxide, as seen in the following equation:
2Al(g) + 2KOH(aq) + 4H2SO4(aq) + 10H2O =====> 2KAl(SO4) + 12(H2O) = 3H2

Using the data below, determine the theoretical and percent yield for this alum synthesis. Note that aluminum is the limiting reactant.

Bottle Mass - 9.8981g

Bottle with Aluminum Pieces - 10.8955g

Final Product with Bottle Mass - 19.0414g
Chemistry
1 answer:
mylen [45]3 years ago
5 0

yield = 52.23 %

Explanation:

We have the following chemical reaction:

2 Al (s) + 2 KOH (aq) + 4 H₂SO₄ (aq) + 10 H₂O → 2 KAl(SO₄)₂·12 (H₂O) (s) + 3 H₂ (g)

mass of aluminium = mass of bottle with aluminium pieces - bottle mass

mass of aluminium = 10.8955 - 9.8981 = 0.9974 g

mass of alum = mass of bottle with final product - bottle mass

mass of alum = 19.0414 - 9.8981 = 9.1433 g

number of moles = mass / molecular weight

number of moles of aluminium = 0.9974 / 27 = 0.03694 moles

number of moles of alum (practical) = 9.1433 / 474 = 0.01929 moles

To calculate the theoretical quantity of alum that should be obtained from 0.03694 moles of aluminium we devise the following reasoning:

if       2 moles of aluminium produce 2 moles of alum

then 0.03694 moles of aluminium produce X moles of alum

X = (0.03694 × 2) / 2 = 0.03694 moles of alum (theoretical)

yield = (practical quantity / theoretical quantity) × 100

yield = (0.01929 /  0.03694) × 100

yield = 52.23 %

Learn more about:

reaction yield

brainly.com/question/7786567

#learnwithBrainly

You might be interested in
1. Calculate the heat change associated with cooling a 350.0 g aluminum bar from
Amanda [17]

Answer:

14175 j heat released.

Explanation:

Given data:

Mass of aluminium = 350.0 g

Initial temperature = 70.0°C

Final temperature = 25.0°C

Specific heat capacity of Aluminium = 0.9 j/g.°C

Heat changed = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

Heat change:

ΔT = Final temperature - initial temperature

ΔT = 25.0°C - 70°C

ΔT = -45°C

Q = m.c. ΔT

Q = 350 g × 0.9 j/g.°C  × -45°C

Q = -14175 j

7 0
3 years ago
Is a new can of paint open or closed system
Brums [2.3K]

Answer:

I think it might be a closed system

8 0
3 years ago
What makes a heterogeneous mixture different from a homogeneous mixture? The components are mixed unevenly instead of evenly wit
bazaltina [42]
<span>is a mixture that composes of components that aren't uniform or they have localized regions that all have different properties. Despite the term appearing to be highly scientific, there are various common substances that are heterogeneous mixtures

</span>
8 0
3 years ago
MethaneProteinAlcohol can be found in beer, wine and liquor.
artcher [175]
The correct answer is alcohol. It is the common component in beer, wine and any liquor. Usually, alcohol is produced by fermentation of organic products containing glucose to produce alcohol, specifically ethanol, as the important product and the by-products water and carbon dioxide. 
3 0
3 years ago
What is the (OH-) in a solution with a pOH of 6.48
inn [45]
Through manipulation of equations, we are able to obtain the equation:

-pOH= log [ OH^{-}]

Then we can transform the equation into:

[ OH^{-}]= 10^{-pOH}

Then we are able to plug in the pOH and directly get [OH-]:

[ OH^{-}] = 10^{-6.48}

[ OH^{-}]=3.31* 10^{-7} M
3 0
3 years ago
Other questions:
  • what the new pressure in kpa of an empty 200 ml aerosol at room temperature 22C and 45 kps if it is thrown into an 800C fire and
    15·1 answer
  • If a bottle of fruit juice contains 2.00L, what volume of fruit juice does it contain?
    10·2 answers
  • What is the ground state shorthand notation for mercury (Hg)?
    15·2 answers
  • Acid and base ph PhET simulation lab
    13·1 answer
  • See picture attached.
    14·1 answer
  • A solid substance formed from a solution is a(n)
    14·2 answers
  • A student wants to reclaim the iron from an 18.0 gram sample of iron (III) oxide, which occurs according to the reaction below:
    14·1 answer
  • Which of the following is compound?
    11·2 answers
  • What is the density of a 500g box whose volume is 67 ml?
    15·1 answer
  • 11. How much heat is required to raise the temperature of a 25 gram block of wood from
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!