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
Yakvenalex [24]
3 years ago
9

What quantity of copper is deposited by the same quantity of electricity that deposited 9g of aluminum

Chemistry
1 answer:
klio [65]3 years ago
3 0

Answer:

Mass of copper deposited = 31.75 g

Explanation:

According to Faraday's second law of electrolysis, when the same quantity of electricity is passed through different electrolytes, the relative number of moles of the elements deposited are inversely proportional to the charges on the ions of the elements.

From this law, it can be seen that the higher the charge, the lower the number of moles of a given element deposited.

Number of moles of aluminium in 9 g of aluminium = mass / molar mass

Molar mass of aluminium = 27 g

Number of moles of aluminium = 9/27 = 1/3 moles

Charge on aluminium ion = +3

3 moles of electrons will discharge 1 mole of aluminium,

1 mole of electrons will discharge 1/3 moles of aluminium

Number of moles of electrons involved = 1 mole of electrons

Charge on copper ion = +2

1 mole of electrons will discharge 1/2 moles of copper.

Mass of 1/2 moles of copper = number of moles × molar mass of copper

Molar mass of copper = 63.5 g

Mass of copper deposited = 1/2 × 63.5 = 31.75 g

You might be interested in
A stream of negatively charged particles is called:
AlladinOne [14]
Cathode rays are a stream of negatively charged particles or electrons in vacuum tubes. They were first seen by Johann Hittorf in 1869. They are named since they are emitted by electrode or cathode. In order to release the electrons, the electrons should first be detached from the atoms of the cathode.
4 0
3 years ago
During the reaction of molecular bromine with 2,2,3-trimethyl pentane initiated by heat or light hydrogen atom will be abstracte
Romashka-Z-Leto [24]

Answer:carbon number 3 of the parent chain

Explanation:

CH3CH2CH(CH3)C(CH3)2CH3.

Looking at the structural formula of the above compound, the carbon on position 3, in the parent chain is a tertiary carbon atom. The reaction in question proceeds by free radical mechanism. Hydrogen is first abstracted from the carbon atom that leads to te formation of the most stable carbocation. For this reason, hydrogen is abstracted from carbon 3 of the parent chain.

8 0
3 years ago
True or false(Internal forces act on the outside of an object, and external forces act within an object.)
kkurt [141]
False I’m not sure exactly
4 0
2 years ago
Do Alkali Metal Compounds form precipitates? And Why?
Alexeev081 [22]

Answer:

Alkali metal hydroxides can be used to test the identity of metals in certain salts. The colour of the precipitate will help identify the metal : Calcium hydroxide is soluble; no precipitate is formed.

6 0
2 years ago
A _ _ has a definite composition that will not vary
emmasim [6.3K]

Answer: Mixtures do not have the same composition, properties, and appearance throughout.

Explanation: It does not vary from sample to sample.

7 0
3 years ago
Other questions:
  • How many mg of a 31-mg sample of calciul 47 remains after 45 days
    9·2 answers
  • What is The strength of a hurricane is ranked from 1 to 5 on the _________________.
    7·1 answer
  • Am i correct if not correct me please
    12·1 answer
  • Factors that limit a technological design are called constrains. But why?
    10·1 answer
  • What of the following could be classified as matter
    13·1 answer
  • I WILL Give BRAINLIST Unlike protists, organisms in the group Animalia
    10·1 answer
  • Which of the following is the best explanation of why an ionic compound formula is a ratio of atoms
    14·1 answer
  • Van der Waals forces hold molecules together by: A. moving electrons from one molecule to another. B. attracting a lone pair of
    10·1 answer
  • Which statements describe the fossil record? Check all that apply.
    14·2 answers
  • What is the purpose of including a stir bar in the distillation flask?.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!