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
stiks02 [169]
3 years ago
14

Balance each of the following examples of heterogeneous equilibria and write each Kc expression. Then calculate the value of Kc

for the reverse reaction.
(1) Al(s) + NaOH(aq) + H2O(l) ⇋ Na[Al(OH)4](aq) + H2(g) Kc for balanced reaction = 11
(2) H2O(l) + SO3(g) ⇋ H2SO4 (aq) Kc for balanced reaction = 0.0123
(3) P4(s) + O2(g) ⇋ P4O6(s) Kc for balanced reaction = 1.56
Chemistry
1 answer:
marysya [2.9K]3 years ago
5 0

Explanation:

1) 2 Al(s) + 2 NaOH(aq) + 6 H_2O(l) \longleftrightarrow 2 Na[Al(OH)_4](aq) + 7 H_2(g)

Kc=\frac{[Na[Al(OH)_4]]^2*[H_2]^7}{[NaOH]^2}

The Kc for the reverse reaction is the inverse of the Kc of the reaction:

Kc_{reverse}=\frac{1}{Kc}=\frac{1}{11}=0.091

2) H_2O(l) + SO_3(g) \longleftrightarrow H_2SO_4 (aq)

Kc=\frac{[H_2SO_4]}{[SO_3]^2}

The Kc for the reverse reaction is the inverse of the Kc of the reaction:

Kc_{reverse}=\frac{1}{Kc}=\frac{1}{0.0123}=81.3

3)  P_4(s) + 3 O_2(g) \longleftrightarrow P_4O_6(s)

Kc=\frac{1}{[O_2]^3}

The Kc for the reverse reaction is the inverse of the Kc of the reaction:

Kc_{reverse}=\frac{1}{Kc}=\frac{1}{1.56}=0.641

You might be interested in
An atom that loses or gains electrons becomes a/an:
Ilia_Sergeevich [38]

Answer: Ion

Explanation:

4 0
3 years ago
Read 2 more answers
A 500.0 mL sample of 0.18 MHClO4 is titrated with 0.27 MCsOH. Determine the pH of the solution after the addition of 250.0 mL of
NNADVOKAT [17]

Answer:

or i go

Explanation:

i must go ooon sjsj

7 0
3 years ago
In which case would recalibrating a thermometer be an important next step in an experiment dealing with boiling points?
Sonbull [250]

I believe the answer would be D

7 0
3 years ago
7. Disulfur dichloride can be made by reacting chlorine gas with molten sulfur. What is the yield of S2Cl2 expected in a laborat
Pie

Answer:

11.4g of S₂Cl₂ is the expected yield

9.69g of S₂Cl₂ are produced with a 85% yield

Explanation:

The reaction of sulfur S₈ with Cl₂ to produce S₂Cl₂ is:

S₈ + 4Cl₂ → 4S₂Cl₂

<em>Where 1 mole of sulfur reacts with four moles of chlorine to produce four moles of disulfur dichloride.</em>

To find the limiting reactant you need to convert mass of each reactant to moles using its molar mass, thus:

S₈ (Molar mass: 256.52g/mol): 10.0g ₓ (1mol / 256.52g) = 0.0390 moles S₈

Cl₂ (Molar mass: 70.9g/mol): 6.00g ₓ (1mol / 70.9g) = 0.0846 moles Cl₂

For a complete reaction of 0.0390 moles of sulfur, there are necessaries:

0.0390 mol S₈ ₓ (4 mol Cl₂ / 1 mol S₈) = <em>0.156 moles Cl₂. </em>As you have just 0.0846 moles of chlorine, Cl₂ is the limiting reactant.

As 4 moles of Cl₂ produce 4 moles of S₂Cl₂.<em> 0.0846 moles of Cl₂ produce, in theory, 0.0846 moles of S₂Cl₂ (Molar mass: 135.04g/mol). </em>In mass:

0.0846 moles S₂Cl₂ ₓ (135.04g/mol) =

<h3>11.4g of S₂Cl₂ is the expected yield</h3>

If you produce just the 85.0% of yield, mass of S₂Cl₂ is:

11.4g ₓ 85% =

<h3>9.69g of S₂Cl₂</h3>
3 0
3 years ago
Helium is an odorless, colorless gas at room temperature. It is less dense than air. That's why helium balloons float. It is a n
Zolol [24]

Answer:

  • Non-flammable
  • It is the only element that doesn't solidify under ordinary pressure and remains a liquid enven at absolute zero.
  • When it electricity runs through helium it glows a pale peach color.
5 0
3 years ago
Other questions:
  • List the two main types of energy.
    6·1 answer
  • What information on the periodic table is used to complete electron dot diagrams? The number before the A at the top of a column
    12·2 answers
  • What is the Damkohler number? b) What is the significance of a system with a low Damkohler number?
    11·1 answer
  • What is the mass of sulfuric acid in 50.0 mL of a 6.00 M solution?
    11·1 answer
  • Wich value gives the number of particles in 1 mol of a substance
    9·2 answers
  • Which of the following devices can measure only atmospheric pressure? A. Pressure gauge B. Mercury tube C. Tire gauge D. Baromet
    14·1 answer
  • Suppose you had 2.0158 grams of hydrogen (H2).
    9·1 answer
  • A group of students used the instructions below to make a model of a watershed. When water washes over the water-soluble ink, th
    5·1 answer
  • How many moles of chlorine are in 100g Chlorine (CI^2)?
    5·1 answer
  • 4 NH3 +5 02 +4NO + 6H2O<br> When 70.25 grams of NH3 react, how many moles of H20 are produced?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!