Question

The ionic compounds NaCl and MgS are represented by the diagrams above. Which statement correctly identifies diagram 1 and identifies the compound with the lower melting point, explaining why?
A
Diagram 1 represents NaCl
NaCl
; it has a lower melting point than MgS
MgS
has because the coulombic attractions between the singly charged Na+
Na
+
ions and the Cl−
Cl
−
ions in NaCl
NaCl
are stronger than those between the ions in MgS
MgS
.
B
Diagram 1 represents NaCl; it has a lower melting point than MgS because the coulombic attractions between its singly charged Na+
ions and the Cl−
Cl
−
ions are weaker than those between the ions in MgS
MgS
.
C
Diagram 1 represents MgS
MgS
; it has a lower melting point than NaCl
NaCl
because the coulombic attractions between its doubly charged Mg2+
Mg
2
+
ions and the S2−
S
2
−
ions are stronger than those between the ions in NaCl
NaCl
.
D
Diagram 1 represents MgS
MgS
; it has a lower melting point than NaCl
NaCl
because the coulombic attractions between the doubly charged Mg2+
Mg
2
+
ions and the S2−
S
2
−
ions are weaker than those between the ions in NaCl
NaCl
B

Answer 1

The magnesium sulfide having a weaker coulombic interaction would have a lower melting point. Option D

What is the correct image?

We know that a substance is said to be ionic if the substance is formed by the interaction of two ions. We know that one of the ions must be positive and the other must be negative. The magnitude of the charges would have an impact on the nature of the interaction between the charges.

Since we know that magnesium sulfide has a double negative charge on sulfur and a double positive charge on magnesium while the sodium has a single positive charge and the chloride has a single negative charge, the magnitude of the interaction between the sodium and the chloride ions is higher thus the magnesium chloride compound shown in image 1 would have a lower melting point.

Learn more about melting point:brainly.com/question/29578567

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