Select the compound with the lowest lattice energy.
A. CsBr(s)
B. NaCl(s)
C. SrO(5)
D. CaO(s)
E. KBr(s)

Question

08-01-2021
Chemistry

Answered

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Select the compound with the lowest lattice energy.
A. CsBr(s)
B. NaCl(s)
C. SrO(5)
D. CaO(s)
E. KBr(s)

Sagot :

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DeniceSandidge DeniceSandidge · Answer 1 · 2021-01-10T20:05:45-05:00

Answer:

A. CsBr(s)

Explanation:

we will get here compound with the lowest lattice energy

solution

As we know that Lattice energy is always proportional to the charge of ions and it is inversely proportional to the size of ions.

so that by the smallest charge and the largest size give us the lowest lattice energy and that charge and size is express as here as

Charge

Cs (+1), K(+1), Na (+1), Cl(-1), Br(-1), Sr(+2), Ca(+2), O(-2) .......................1

and

Size

Na+ < Ca2+ < K+ < Sr2+ < Cs+, O2- < Cl- < Br- ..........................2

so that here

correct answer is A. CsBr

tutorareej tutorareej · Answer 2 · 2021-12-07T04:48:24-05:00

The CsBr has the smallest charge and maximum size of the ions, the lattice energy of the compound has been the lowest. Thus option A is correct.

Lattice energy can be defined as the amount of energy required to remove a mole of ion to its gaseous state.

The lattice energy has been dependent on the charge and size of the ions.

Higher charge = Higher lattice energy

Higher size = Lower lattice energy

In CsBr, the charge of Cs has been +1, and the size of Br has been the smallest among the given.

In NaCl, the charge of Na has been +1, and the size of Cl has been smaller than Br.

In SrO, the charge of Sr has been +2, and the size of O has been smaller than Cl.

In CaO, the charge of Ca has been +2, and the size of O has been smaller than Cl.

In KBr the charge of K has been +1, and the size of Br has been the smallest among the given. However, the size of the K ion has been smaller than the Sr atom.

Since the CsBr has the smallest charge and maximum size of the ions, the lattice energy of the compound has been the lowest. Thus option A is correct.

For more information about lattice energy, refer to the link:

https://brainly.com/question/17011733

Sagot :

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