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
lozanna [386]
3 years ago
11

The powder mixture (Cu, Al and Fe) = 10g was oxidized from sufficient chloride acid. 1) What are the possible reactions to the p

roduct? So, write the balance equation of the reaction. 2) They got 6.38L of H2 measured under normal conditions and 2.5g solid waste. Calculate each metal mass of the original mixture. Atomic mass was given as gxmol-1: M (Cu) = 63.5, M (Al) = 27, M (Fe) = 56.
Chemistry
1 answer:
Mandarinka [93]3 years ago
4 0

Answer:

1) 2Al + 6HCl ⟶ 2AlCl₃ + 3H₂

    Fe + 2HCl ⟶ FeCl₂ + H₂

2) Cu = 2.5 g; Al = 3.5 g; Fe = 4.0 g  

Explanation:

1) Possible reactions

2Al + 6HCl ⟶ 2AlCl₃ + 3H₂

Fe + 2HCl ⟶ FeCl₂ + H₂

2) Mass of each metal

a) Mass of Cu

The waste was the unreacted copper.

Mass of Cu = 2.5 g

b) Masses of Al and Fe

We have two relations :

Mass of Al + mass of Fe = 10 g - 2.5 g = 7.5 g

H₂ from Al + H₂ from Fe = 6.38 L at NTP

i) Calculate the moles of H₂

NTP is 20 °C and 1 atm.

\begin{array}{rcl}pV & = & n RT\\\text{1 atm} \times \text{6.38 L} & = & n \times 0.08206 \text{ L}\cdot\text{atm}\cdot\text{K}^{-1}\text{mol}^{-1} \times \text{293.15 K}\\6.38 & = & 24.06n \text{ mol}^{-1} \\n & = & \dfrac{6.38}{24.06 \text{ mol}^{-1} }\\\\ & = & \text{0.2652 mol}\\\end{array}

(ii) Solve the relationship

 Let x = mass of Al. Then

7.5 - x = mass of Fe

Moles of Al = x/27

Moles of Fe = (7.5 - x)/56

Moles of H₂ from Al = (3/2) × Moles of Al = (3/2) × (x/27) = x /18

Moles of H₂ from Fe = (1/1) × Moles of Fe = (7.5 - x)/56

∴ x/18 + (7.5 - x)/56 = 0.2652

    56x + 18(7.5 - x) = 267.3

      56x + 135 - 18x = 267.3

                        38x = 132.3

                            x = 3.5 g

Mass of Al = 3.5 g

Mass of Fe = 7.5 g - 3.5 g = 4.0 g

The masses of the metals are Cu = 2.5 g; Al = 3.5 g; Fe = 4.0 g

You might be interested in
Pollution is an example of what kind of environmental problem
olchik [2.2K]

climate change and it could make it harder for us as humans and animals to breath move or doing everyday tasks

3 0
3 years ago
Why are plastic building blocks good for building molecules
9966 [12]
Plastic building blocks are good for building molecules because of some useful properties which they possess. For instance, plastic are flexible, they can be easily manipulated and can be made into any shape, size and combination. They can also be produced using different colors. Because of these features, they can be used to build and to explain how molecules behave.
5 0
3 years ago
Read 2 more answers
Will mark Brainliest!!! PLEASE HELP
GalinKa [24]
1= D
2= B
3= E
4= F
5= A
8 0
3 years ago
Which kind of magma produces a quiet volcanic eruption
Ilia_Sergeevich [38]
Mafic lava is low viscosity lava that creates quiet eruptions.

3 0
3 years ago
Read 2 more answers
A ____ is the remains of a once-living organism found in layers of rocks, ice, or amber
aksik [14]

Answer:

fossil

Explanation:

the dead organism is called a fossil i think

8 0
3 years ago
Read 2 more answers
Other questions:
  • Express the following numbers as standard form:<br> a) 1.52 x 10^-2<br> b) 7.78 x 10^-8
    5·1 answer
  • How many molecules of carbon monoxide (co) are needed to react with excess iron (iii) oxide (fe2o3) to produce 11.6 g of iron (f
    10·1 answer
  • The label on an ocean spray cran-rasberry drink lists 30 g of sugar in 240 ml of drink. I weighed 240 ml of drink and found its
    10·1 answer
  • The eastern coast of South America and the western coast of Africa are separated by the Atlantic Ocean. If scientists find the s
    9·1 answer
  • Explain the large difference in boiling points between CH4 and CBr4
    9·1 answer
  • What is the molarity of the solution with respect to NaCL
    9·1 answer
  • As Mia mixed two substances in a test tube, she noticed that the test tube became warm. She also noticed gas coming from the tes
    5·1 answer
  • What is the product(s) of the reaction below?
    8·1 answer
  • How many grams of Fe2O3 are formed when 51.3 grams of iron, Fe, react completely with oxygen, O2?
    9·1 answer
  • Earth carrying capacity is determined by our ?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!