All categories

3 years ago

In a redox reaction, reduction is defined by the:

Chemistry

1 answer:

jonny [76]3 years ago

5 0

Answer:

C. Gain in electron(s) resulting in a decrease of oxidation number.

Explanation:

Redox reactions are reactions involving transfer of of electron between two species (reduction specie) and (oxidation species) and change resulting in change in oxidation number.

Reduction in terms of redox reaction is the specie that accepts electron(s) and gets "reduced" since its oxidation state has been reduced.

For example

Cl + e- → Cl⁻

The above reaction is an example of reduction reaction taking place in a redox reaction. We can see that Chlorine oxidation state was changed from (0) to (-1) state.

You might be interested in

Calculate ΔH (in kJ) for the process Hg2Br2(s) → 2 Hg(l) + Br2(l) from the following information.

Ilia_Sergeevich [38]

Answer : The enthalpy change of reaction is 206.9 kJ

Explanation :

According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.

According to this law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.

The given final reaction is,

$Hg_2Br_2(s)\rightarrow 2Hg(l)+Br_2(l)$ $\Delta H=?$

The intermediate balanced chemical reaction will be,

(1) $Hg(l)+Br_2(l)\rightarrow HgBr_2(s)$ $\Delta H^o_1=-170.7kJ$

(2) $Hg(l)+HgBr_2(s)\rightarrow Hg_2Br_2(s)$ $\Delta H^o_2=-36.2kJ$

First we will reverse the reaction 1 and 2 then adding both the equation, we get :

(1) $HgBr_2(s)\rightarrow Hg(l)+Br_2(l)$ $\Delta H^o_1=+170.7kJ$

(2) $Hg_2Br_2(s)\rightarrow Hg(l)+HgBr_2(s)$ $\Delta H^o_2=+36.2kJ$

The expression for final enthalpy is,

$\Delta H=\Delta H^o_1+\Delta H^o_2$

$\Delta H=(+170.7kJ)+(+36.2kJ)$

$\Delta H=206.9kJ$

Therefore, the enthalpy change of reaction is 206.9 kJ

8 0

2 years ago

Read 2 more answers

Dissolving a spoonful of sugar in tea or coffee is an example of

Virty [35]

It’s an example of dissolving

5 0

2 years ago

When adjusted for any changes in δh and δs with temperature, the standard free energy change δg∘t at 2400 k is equal to 1.22×105

rosijanka [135]

When adjusted for any changes in δh and δs with temperature, the standard free energy change δg∘t at 2400 k is equal to 1.22×105j/mol, then the equilibrium constant at 2400 k is 2.21×10−3. The answer to the statement is 2.21×10−3.

6 0

3 years ago

Read 2 more answers

Disease causing bacteria need oxygen to survive.<br> true or false

Ghella [55]

Answer:

true

Explanation:

its a guess

6 0

2 years ago

Read 2 more answers

A graduated cylinder was filled to 20.3 mL with water. A solid object weighing 73.05 g was immersed in the water, raising the me

victus00 [196]

The density of the solid object will be 2.63 g/mL

<h3>What is density?</h3>

Density of objects = mass/volume.

Recall that an object will always displace its own volume when placed in a liquid.

Volume of the solid object = Cylinder reading after immersing the object in the water - cylinder reading before immersing the object in the water.

= 48.1 - 20.4

= 27.8 mL

Mass of the solid object = 73.05 g

Density of the object = 73.05/27.8

= 2.63 g/mL

More on density can be found here: brainly.com/question/15164682

#SPJ1

3 0

11 months ago