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
tangare [24]
3 years ago
7

How many moles of KOH are measured in thisexperiment? See the volume and molarity information given. 2.How many moles of KOH rea

cted with the amount of Al you used? Refer to the reaction equation in the first few lines of the experiment.3.How many moles of KOH were left over?

Chemistry
1 answer:
Daniel [21]3 years ago
5 0

Answer:

0.022 moles of potassium hydroxide reacted with Aluminum and 0.013 moles of potassium hydroxide were left over.

Explanation:

2Al(s) + 2KOH(aq) + 6H2O(l) → 2KAl(OH)4(aq) + 3H2(g)

First we obtain the amount in moles of aluminum added in line with the mass of aluminum to be added in the experimental procedure. This shows us that aluminum metal is the limiting reactant.

Secondly we obtain the amount of KOH in 25mL of 1.4M KOH solution(see attached image). This gives the amount of KOH availiable for reaction.

2 moles of Aluminum metal reacts with 2 moles of KOH according to the balanced reaction equation. Hence 0.022 moles of aluminum will react with 0.022 moles of KOH.

The amount of KOH left unreacted is 0.035-0.022= 0.013 moles of KOH.

You might be interested in
1]
balu736 [363]

Explanation:

Given -

  • An organic compound gives H₂ gas with Na
  • On treatment with alkaline iodine it gives yellow ppt.
  • On oxidation with CrO₃/H⁺ forms an aldehyde (C₂H₄O)

To Find -

  • Name the compound and write the reaction involved

Now,

Let A be the organic compound.

Then,

  1. A + Na → + H₂↑
  2. A + I₂ → CHI₃ (yellow ppt.)
  3. A + CrO₃ + H⁺ → C₂H₄O

Now,

Here we see that compound A reacts with chromic oxide (CrO₃) in the presence of acidic medium gives aldehyde.

  • Functional group of aldehyde = —CHO

And It forms only 2 Carbon aldehyde it means, It is Ethanal (CH₃CHO).

Compound A reacts with chromic oxide (CrO₃) in the presence of acidic medium gives ethanal.

It means,

We know that 1° alcohol on oxidation gives aldehyde.

Here it gives 2 Carbon aldehyde.

It means,

Here 2 Carbon and 1° alcohol is used.

Now,

Its cleared that Compound A is Ethanol.

Reaction Involved -

  1. CH₃CH₂OH + Na → CH₃CH₂O⁻Na⁺ + H₂↑
  2. CH₃CH₂OH + I₂ + OH⁻ → CHI₃↓ + HCOO⁻ + HI + H₂O
  3. CH₃CH₂OH + CrO₃ + H⁺ → CH₃CHO

6 0
3 years ago
How could you verify that you produced carbon dioxide in your combustion reaction? 2. what indication did you have that nh3 was
DanielleElmas [232]

1) Carbon dioxide is a gas, so when CO_{2} is evolved in the reaction, it appears as bubbles. The gas released extinguishes the fire and it can turn lime water milky.

Ca(OH)_{2} (aq) + CO_{2}(g) ----> CaCO_{3}(s) +H_{2}O(l)

2) When NH_{3} is released in a decomposition reaction we can identify by the strong pungent smell of the gas released.

3) Saturated citric acid can cause corrosion of the metal layers present in the pipes. So, before draining out any acid it is neutralized so that the pipes and other plumbing works do not get damaged leading to leaks in the drainage system.

5 0
3 years ago
List four ways that scientific information is communicated to the general public
lawyer [7]
1. Publishing work in journals
2. Publishing on blog sites
3. Publishing with magazines and newspapers
4. Present at public lectures
5 0
3 years ago
At what temperature scale Fahrenheit shows double than Kelvin scale​
sergij07 [2.7K]

Answer:

-12.3 degrees F.

Originally Answered: At what temperature does the Kelvin scale read double the Fahrenheit reading? -24.6 degrees C = -12.3 degrees F.

Explanation:

8 0
3 years ago
How many donuts are in a mole of donuts ?​
pychu [463]

Whats the donar mass

5 0
3 years ago
Read 2 more answers
Other questions:
  • What mass of mgf2 is contained in 80.85 g of a 22.4% by mass solution of mgf2 in water?
    11·2 answers
  • Match the scientist to his contribution to the atomic theory - Thomson - Rutherford - Bohr A. Electron energy levels B. Nucleus
    13·1 answer
  • Which of the following is a cause of eutrophication of a lake?
    7·2 answers
  • Why do atoms share electrons in covalent bonds??
    8·2 answers
  • Scoring Scheme: 3-3-2-1 Use one of your experimentally determined values of k, the activation energy you determined, and the Arr
    12·1 answer
  • A reaction at evolves of dinitrogen monoxide gas. Calculate the volume of dinitrogen monoxide gas that is collected. You can ass
    12·1 answer
  • Can someone help me?​
    12·1 answer
  • Which element is smaller is atomic size?
    9·1 answer
  • If you have a balloon inside a car at noon during a hot summer day, the balloon molecules
    12·2 answers
  • Name the following aromatic hydrocarbon:
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!