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because Mg and O have more electropositivity and electronegativity rspt. than Na and Cl atoms.
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Why lattice energy of nacl is greater then kcl and kbr?
Lattice energy increases with greater charge and smaller size. Since the charges are the same for both compounds, you have to look at the sizes of the atoms, K and Na, and since both have Cl, you don't have to compare that with anything. K is larger than Na, so since NaCl has a smaller size and the same charge, it has higher lattice energy.
Why is sodium nitrate more soluble than potassium nitrate?
Yes. Because hydration energy of Na+ is greater than K+. More the hydration energy greater is solubility. A compound is soluble if hydration energy is greater than lattice energy.
Why is the lattice energy of potassium bromide more exothermic than the lattice energy of rubidium iodide?
The lattice energy of potassium bromide is more exothermic than the lattice energy of rubidium iodide because lattice energy is inversely proportional to atomic radius.
Can lattice space of NaCl crystal be determined by diffraction experiment with sodium yellow light?
No. The ions of a salt as simple as NaCl are smaller than the wavelength of any visible liqht; X-rays are needed to determine lattice spacing.
Does calcium oxide have a higher lattice energy than magnesium oxide?
Cao or CaS have a higher lattice energy
Why lattice energy of nacl is greater then kcl and kbr?
Lattice energy increases with greater charge and smaller size. Since the charges are the same for both compounds, you have to look at the sizes of the atoms, K and Na, and since both have Cl, you don't have to compare that with anything. K is larger than Na, so since NaCl has a smaller size and the same charge, it has higher lattice energy.
Is iron carbonate a soluble salt?
Its Lattice energy is greater than the solvation energy of water.
Why is sodium nitrate more soluble than potassium nitrate?
Yes. Because hydration energy of Na+ is greater than K+. More the hydration energy greater is solubility. A compound is soluble if hydration energy is greater than lattice energy.
Why is the lattice energy of potassium bromide more exothermic than the lattice energy of rubidium iodide?
The lattice energy of potassium bromide is more exothermic than the lattice energy of rubidium iodide because lattice energy is inversely proportional to atomic radius.
If the lattice energy of compound A is greater than compound B is A an ionic compound?
The bonds in compound A are stronger than the bonds in compound B.
Why does NaCl have a high melting point than KCl?
This can be rationalised by looking at the lattice energy. Using Madelungs method the smaller Na+ ion causes a stronger coulombic attraction making it harder to beak up the lattice and increasing the mp.
Can lattice space of NaCl crystal be determined by diffraction experiment with sodium yellow light?
No. The ions of a salt as simple as NaCl are smaller than the wavelength of any visible liqht; X-rays are needed to determine lattice spacing.
Does calcium oxide have a higher lattice energy than magnesium oxide?
Cao or CaS have a higher lattice energy
Why do sugar dissolve faster then salt in water?
For dissolving any solute the solvation energy of the solvent has to be more than the lattige energy of the solute. In this case the lattice energy of Nacl[salt] is more than that of sugar. Hence it takes more time to dissolve in water. ---- Akashraj Ghosh.
Why solubility of NaCl in water is greater than glucose.?
The
Why is lattice energy of MgF2 greater than MgCl2?
since ca2+ has a larger atomic radii compared to Mg2+ (and the same for F and CL2), the electrons are dispersed over a wider surface area and so have a lesser strength than that of magnesium. Hence, with a smaller atomic radii, Magnesium has stronger attractive forces with require more energy to be broken and therefore making it more exothermic than calcium.
Why do some pair of ions in solution form precipitates?
It is a matter of lattice energy vs. heat of solution. The lattice energy is the energy change associated with the ions in the gas phase forming a solid (crystalline) lattice. It is typically an exothermic process, liberating energy. The heat of solution is the energy change associated with the ions being dissolved by solvent, and can be exothermic or endothermic. If the heat of solution is more exothermic than the lattice energy, than it is energetically favorable for the ionic compound to be solvated. If the lattice energy is more exothermic, than solvation will not occur.
