All categories

2 years ago

Which of the following reactions are redox reactions?

Chemistry

1 answer:

strojnjashka [21]2 years ago

3 0

Answer:

Options A, C and D.

Explanation:

Oxidation is the loss of electrons during a reaction by a molecule, atom or ion. It is represented by an increase in the oxidation number.

Reduction is the loss of electrons during a reaction by a molecule, atom or ion. It is represented by a decrease in the oxidation number.

Both processes makes up what we know as Redox (REDuction - OXidation) reactions.

Note: The oxidation number of an element in its ground state is 0.

To identify which reactions are redox, we look out for change in oxidation number of the molecule, atom or ions involved.

A) Al has an increase in oxidation number for 0 (reactant side) to +3 (product side), Silver moves from +1(reactant) to 0 (product side). this means Al was oxidized and Ag+ was reduced. This is a redox reaction.

B) All atoms involved retains their oxidation number. S= +6, O =-2, H =+1. This is not a redox reaction.

C) Ba has an increase in oxidation number form 0 to +2, while Cl has a decrease in oxidation number form 0 to -2. This is a redox reaction.

D) Mg has an increase in oxidation number form 0 to +2, while Br has a decrease in oxidation number form 0 to -2. This is a redox reaction.

You might be interested in

Calculate the number of moles in 23.50 liters of dinitrogen monoxide gas at STP

babunello [35]

Answer:

Explanation:

5 0

2 years ago

Ammonia can be made by reaction of water with magnesium nitride as shown by the following unbalanced equation: Mg3N2(s) + H2O(l)

Galina-37 [17]

The link above is a scam

5 0

2 years ago

Biuret reagent will indicate the presence of

weeeeeb [17]

Biuret reagent will indicate the presence of protein in a given sample. It is also known as the Piotrowski's test. This reagent consists of copper (II) sulfate and sodium hydroxide. It detects peptide bonds by the reaction of the copper ions in an alkaline solution. The copper ions would form violet colored complexes when peptide is present in the solution. From this test, concentration can be calculated since the intensity of the color depends on the amount of peptide bonds and according to the Beer-Lambert law concentration and the absorption of light is proportional. The concentration is calculated by a spectrophotometric technique at a wavelength of 540 nm.

5 0

2 years ago

Hello,

nikitadnepr [17]

Answer:

$a)\ 2FeSO4 \xrightarrow{\text{Heat}} SO_3+SO_2+Fe_2O_3\\b)\ Decomposition\ Reaction$

Explanation:

Ferrous Sulphate $(FeSO4)$ is generally found as Lime-Green Crystals. On heating, these crystals almost immediately turn white-yellow. They then, break down to produce an anhydrous mixture of Sulphur Trioxide $(SO_3)$ , Sulphur Dioxide $(SO_2)$ as well as Ferric Oxide $(Fe_2O_3)$ .

We can hence, frame a skeletal equation of this reaction and try to balance it.

Hence,

$FeSO4 \xrightarrow{\text{Heat}} SO_3+SO_2+Fe_2O_3$

Now,

a)In order to balance it through the 'Hit &Trial Method', we'll follow a series of steps:

1. First, lets compare the number of Fe (Iron) atoms on the RHS and LHS. We find that, the no. of Fe Atoms on the RHS is twice the number of Fe Atoms on the LHS. We hence, add a co-effecient 2 beside $FeSO_4$ .

2. Now, Iron atoms, Sulphur Atoms and Oxygen atoms occur 2, 2, 8 respectively on both the sides:

Hence, As all the other elements as well as iron, balance, we've arrived upon our Balanced Equation :

$2FeSO4 \xrightarrow{\text{Heat}} SO_3+SO_2+Fe_2O_3$

b) We know that, decomposition reactions are [generally] endothermic reactions in which Large Compounds decompose into smaller elements and compounds. Here, as Ferrous Sulphate decomposes into Sulphur Dioxide, Sulphur Trioxide and Ferric Oxide, the reaction that occurs here is Decomposition Reaction.

7 0

2 years ago

Help pleaseee!!!Please explain how evaporation condensation and precipitation are involved in the water cycle

gizmo_the_mogwai [7]

Answer: The water cycle shows the continuous movement of water within the Earth and atmosphere. ... Liquid water evaporates into water vapor, condenses to form clouds, and precipitates back to earth in the form of rain and snow. Water in different phases moves through the atmosphere (transportation).

Explanation:

8 0

2 years ago

Read 2 more answers