Ask question

Ask question

All categories

3 years ago

15

Which formula equation shows a reversible reaction?

2 answers:

timurjin [86]3 years ago

8 0

The question is incomplete, here is the complete question:

Which formula equation shows a reversible reaction?

A: $2Na+F_2\rightarrow 2NaF$

B: $CaCO_3\rightarrow CaO+CO_2$

C: $NH_4Cl(s)\rightleftharpoons 2NH_3(g)+HCl(g)$

D: $2H_2O_2(aq.)+Pt\rightarrow 2H_2O(l)+O_2(g)$

<u>Answer:</u> The reversible reaction is $NH_4Cl(s)\rightleftharpoons 2NH_3(g)+HCl(g)$

<u>Explanation:</u>

Reversible reaction is defined as the reaction in which the products formed react together to give the reactants back. For general reversible chemical equation:

$A+B\rightleftharpoons C+D$

Irreversible reaction is defined as the reaction in which the reactants only lead to products and the reaction do not proceed back. For general irreversible chemical reaction:

$A+B\rightarrow C+D$

For the given options:

The reaction having an equilibrium sign between the reactants and products is equation C.

Hence, the reversible reaction is $NH_4Cl(s)\rightleftharpoons 2NH_3(g)+HCl(g)$

pishuonlain [190]3 years ago

3 0

Answer:2NaF is the correct one. It’s a simple combination and can be be split with relative ease

Explanation:

You might be interested in

How many electrons are in the outermost energy level of a neutral<br> Fluorine atom?

Yuki888 [10]

Answer:

The answer is 7 (seven)

Explanation:

Fluorine has seven of eight possible electrons in its outermost energy level, which is energy level II.

5 0

3 years ago

Describe an electron cloud. Then, name and explain a particular atomic model that used the concept of the electron cloud.

pochemuha

Electron cloud is the region around the nucleus in an atom where we can locate an electron.

The concept of electron cloud model was introduced by the Schrodinger and Heisenberg. According to this model, it would be difficult to know the position of the electrons in an atom and they are not particles that orbit around the nucleus. We can only expect the electrons to be present in specific areas called the electron clouds around the nucleus. It is the quantum mechanical model that used the concept of electron clouds. According to the model, the electron cloud or an orbital is a space around the nucleus in an atom where the probability of finding an electron is 90%. It explains that electrons show wave nature. It is difficult to determine the exact position and momentum of an electron in an atom.

3 0

3 years ago

CAN SOMEONE HELP ME PLEASE ?

kkurt [141]

The correct is answer is A, because fertilizer provides nitrogen to plants

5 0

3 years ago

What is the pH of a solution with an OH- ion concentration of 4.01E-4?

Ber [7]

Answer:

[H]=10^-4 when ph=4 higher

[H]=10^-5 when ph =5 lower

Explanation:

brains

8 0

3 years ago

Phosphorus pentachloride decomposes according to this equation. PCl5(g) equilibrium reaction arrow PCl3(g) + Cl2(g) An equilibri

melisa1 [442]

Answer:

PCl₅ = 0.03 X 208 = 6.24g

PCl₃ = 0.05 X 137 =6.85 g

Cl₂ = 0.03X71 = 2.13 g

Explanation:

The equilibrium constant will remain the same irrespective of the amount of reactant taken.

Let us calculate the equilibrium constant of the reaction.

Kc= $\frac{[PCl_{3}][Cl_{2}]}{[PCl_{5}]}$

Let us calculate the moles of each present at equilibrium

$moles=\frac{mass}{molarmass}$

molar mass of PCl₅=208

molar mass of PCl₃=137

molar mass of Cl₂=71

moles of PCl₅ = $\frac{mass}{molarmass}=\frac{4.13}{208}=0.02$

moles of PCl₃= $\frac{mass}{molarmass}=\frac{8.87}{137}=0.06$

moles of Cl₂ = $\frac{mass}{molarmass}=\frac{2.90}{71}=0.04$

the volume is 5 L

So concentration will be moles per unit volume

Putting values

Kc = $\frac{\frac{0.06}{5}\frac{0.04}{5}}{\frac{0.02}{5}}=0.024$

Now if the same moles are being transferred in another beaker of volume 2L then there will change in the concentration of each as follow

$PCl_{5}--->PCl_{3}+Cl_{2}$

Initial 0.02 0.06 0.04

Change -x +x +x

Equilibrium 0.02-x 0.06+x 0.04+x

Conc. (0.02-x)/2 (0.06+x)/2 (0.04+x)/2

Putting values

0.024 = $\frac{(0.06+x)(0.04+x)}{(0.02-x)2}$

Solving

$(0.024(2)(0.02-x)=(0.06+x)(0.04+x)$

$0.00096-0.048x=0.0024+x^{2}+0.1x$

$0.148x+x^{2}+0.00144=0$

x = -0.01

so the new moles of

PCl₅ = 0.02 + 0.01 =0.03

PCl₃ = 0.06-0.01 = 0.05

Cl₂ = 0.04-0.01 = 0.03

mass of each will be:

mass= moles X molar mass

PCl₅ = 0.03 X 208 = 6.24g

PCl₃ = 0.05 X 137 =6.85 g

Cl₂ = 0.03X71 = 2.13 g

5 0

4 years ago