The oxygen atom is in the "middle" of the water molecule and has a slight negative charge. Refer to the related link below.
Water is a universal solvent because substances get dissolve in water easily. It is due to the polarity of each water molecule. The hydrogen has a positive charge, thus attracting the negative part of an ionic compound, while the oxygen has a negative charge and thus attracts the positive part of an ionic compound.
dissociation
They are: cation (positive) and anion (negative).
An ionic compound can form interactions with water. Water happens to be a polar molecule. The positive ions are going to react with the partially charged negative ions (that are in the water). The negative ions will react with the partially positive charged hydrogen atoms in the water. But the ionic compound won't dissolve in oil because it can't form the same reaction.
Water is a polar molecule meaning the oxygen part is negative the hydrogen is positive, so in an ionic compound the negative ion get attracted to the hydrogen and the positive ion to the oxygen.
Ionic compounds are made up of a positive cation (the metal) and a negative anion (the nonmetal). They are soluble in water because they can dissociate. The positive cations are attracted to the negative oxygen side of water molecules while the negative anions are attracted to the positive hydrogen side of water molecules. Water is a polar molecule and pulls the ions that make up the compound away from each other, thus causing the compound to be soluble.
Potassium chloride is an ionic compound, composed of positive potassium ions and negative chloride ions. When it dissolves in water, the ions separate and become surrounded by water molecules. Water is a covalent compound, but it is polar, which means that one end (the oxygen) is a little bit negative, and the other is a little bit positive. The slightly negative ends are attracted to the positive potassium ions and the slightly positive ends are attracted to the chloride ions. These are electrostatic attractions.
An ionic compound can form interactions with water. Water happens to be a polar molecule. The positive ions are going to react with the partially charged negative ions (that are in the water). The negative ions will react with the partially positive charged hydrogen atoms in the water. But the ionic compound won't dissolve in oil because it can't form the same reaction.
Yes, it is true
The shape and charge distribution in a water molecule cause it to have a permanent dipole moment, which consist of a positive electric charge and a negative charge separated by a distance in space. Therefore, the part of a water molecule that corresponds to the negative charge of its dipole moment is attracted to positive ions, and the part of a water molecule that corresponds to the positive charge of its dipole moment is attracted to negative ions.
Water is a highly polar molecule which means that one side of the molecule is slightly positive and the other is slightly negative. This means that water molecules are attracted and can form weak bonds with molecules that also have positive sides and negative sides (polar molecules). Basically, the positive side of the water molecule is attracted to the negative side of the polar molecule and the negative side of the water molecule is attracted to the positive side of the polar molecule. Is this way the water is able to surround and separate the polar molecules. The story is much the same for an ionic compound which contains a mixture of positive and negative ions. The positive side of the water molecules surround the negative ions and the negative side of the water molecules surround the positive ions.
An ionic compound conducts electricity when dissolved because the the solution containing the ionic compound dissociates into positive and negative ions. (assuming the solvent is water) Now, the potential between the positive and negative electrode causes the positive and negative ions to move between the electrodes, carrying electrons with them, kind of like a convater belt. The only thing is that there isn't any net flux of material so you can't mix water using a battery.