Number of results: 4,285
None. Many people, and I include myself, misuse the two terms because we often use them interchangeably. Actually, they are not. Two examples. 1. NaCl is a solid crystal that consists of Na^+ and Cl^- bound together in a crystal lattice. When this crystal is placed in water it...
Sunday, April 25, 2010 at 10:50pm by DrBob222
Your thinking is ok. All ionic solids, although composed of ions, are locked into place by the crystal lattice structure of the compound. Thus the ions are not free to move about and they can not conduct electricity.
Monday, April 26, 2010 at 7:07pm by DrBob222
Hi these are the posts from earlier---i just had a quetsion about your response: ""Apchemistry - DrBob222, Monday, April 26, 2010 at 7:10pm Your thinking is ok. All ionic solids, although composed of ions, are locked into place by the crystal lattice structure of the compound...
Monday, April 26, 2010 at 8:07pm by Kiki
I am a little confused; I think you may have contradicted yourself. I'll try to answer each part of your response. Yes, the ions in a crystal lattice do posses some vibrational energy and I suppose it would not be outlandish to suggest that one or two of them (out of billions ...
Monday, April 26, 2010 at 8:07pm by DrBob222
I think E is the correct answer. The answer in B refers to dipole-dipole forces BETWEEN OPPOSITELY CHARGED IONS. Oppositely charged ions do attract each other but those are ionic forces and not dipoles. There are ion-dipole bonds, too, especially in solution form, but again ...
Saturday, May 1, 2010 at 9:42pm by DrBob222
The Na^+ and the Cl^- attractive forces are holding the crystal lattice together while the water dipoles are trying to pull the ions out of the crystal lattice.
Wednesday, May 5, 2010 at 8:47pm by DrBob222
I am confused about this statement about water Which of the following is TRUE regarding water only covalent bonds are broken when ice melts (dont think so) all of the staements (A-D) are false energy must be given off in order to break down the crystal lattice of ice to a ...
Tuesday, May 11, 2010 at 8:13pm by Andy
In melting a solid the crystal lattice is broken down and the molecules that were in a fixed position are free to move around. Evaporation takes it one step further. As molecules gain more energy in the liquid state (from heating, the sun, normal vapor pressure, etc), the more...
Wednesday, May 19, 2010 at 2:14pm by DrBob222
NaCl is an ionic compound. It is a solid made up of Na^+ and Cl^- interlaced into a three dimensional crystal lattice; thus there is no NaCl molecule as such. We write the formula as NaCl because that is the simplest empirical formula but it really is NaxClx because the Na^+ ...
Friday, July 2, 2010 at 10:27pm by DrBob222
I don't understand the a answer so I can't comment. You;re right about b. I think c is wrong; entropy should increase the other way. You know e can't be right; free-wheeling ions in solution to a crystal lattice is negative S. But for d, if we go from a lattice structure in ...
Saturday, July 3, 2010 at 10:55am by DrBob222
Slow crystal growth consists of a tiny seed crystal forming and other molecules of the crystal joining the crystal lattice bit by bit. The end result may not be a group of tiny crystals but the initial seed crystal can become quite large. Slow crystal growth gives compounds ...
Saturday, August 7, 2010 at 9:46pm by DrBob222
CH3OH will have a higher melting point because of hydrogen bonding in the crystal lattice.
Tuesday, August 10, 2010 at 6:39pm by DrBob222
Propene is a gas. Methanol is a liquid. I would think methyl alcohol (methanol) has hydrogen bonds in the crystal lattice so it has a higher melting point than propene.
Thursday, August 12, 2010 at 1:49pm by DrBob222
A yes. B no. C probably yes. Wouldn't the entropy increase as the crystal lattice of NH4NO3 is broken and individual ions are floating around, even at a lower temperature? D yes.
Wednesday, October 20, 2010 at 9:33pm by DrBob222
1) why do copper 2 sulfate chrystals not conduct electricty? In the solid state, the ionic crystals can't move because they are aligned in a crystal lattice. 2)why is copper 2 sulfate solution a good conductor of electricity? In the aqueous state, the crystal lattice is broken...
Monday, November 22, 2010 at 1:25pm by DrBob222
Heat formation = Hsubl + IP + 1/2(bond diss) + electron affinity(a negative value) + 1/2(vaporization) + Ecrystal lattice. Substitute and solve for E crystal. If your text defines crystal lattice energy as -Ecrystal, then reverse the sign. Something like +750 or so kJ/mol.
Saturday, December 4, 2010 at 8:57pm by DrBob222
There are a number of things to look at. For a, HCl is largely a covalent bond (although polar covalent) while KCl is an ionic solid. Ionic solids melt higher than most covalently bonded materials because the ionic solids must break the crystal lattice bonds. Cu has metallic ...
Monday, February 28, 2011 at 6:46pm by DrBob222
aah! BUT MgCl2 is an ionic compound and NCl3 is covalently bonded. Most ionic compounds boil higher (and melt higher) because it takes so much energy to break the crystal lattice of the ionic compound. And after melted, the ions of Mg^+2 and Cl^- have a much higher attraction ...
Thursday, March 3, 2011 at 4:37pm by DrBob222
solid KC consists of K^+ and Cl^- in a structured crystal lattice. If in solution, we have the hydrated K and Cl ions; i.e., K^+(aq) + Cl^-(aq)
Thursday, April 7, 2011 at 8:32pm by DrBob222
I assume you are talking about the Na+ and Cl- in the crystal. Wouldn't you think that the attraction between the water molecules and the ions is greater since adding NaCl crystals to water breaks the crystal lattice and the Na+ and Cl- are free to move about in solution.
Wednesday, April 13, 2011 at 4:56pm by DrBob222