Because of the unequal sharing of electrons. As in H2O, Hydrogen has a positive charge and Oxygen has a negative charge.
ionic molecules dissolve the most. but some polar covalent molecules also do dissolve in water.
polar covalent
water dissolves ALL ionic and ALL polar compound's;examples of each are;Polar compound's,ethanol, ammonia, Hydrogen Fluoride, sulphur dioxide, acetoneIonic compounds,sodium chloridepotassium chloridelithium chloriderubidium chloridecesium chloride
Polar Covalent Bond
Coordinate covalent bond is always polar because only one atom supplied both shared pair electron due to which partial positive charge appears on donar and partial negative charge on acceptor
ionic molecules dissolve the most. but some polar covalent molecules also do dissolve in water.
polar covalent
No, not all compounds with polar covalent bonds are polar molecules. Whether a molecule is polar or nonpolar depends on its overall symmetry and the arrangement of its polar bonds within the molecule. In some cases, the polarities of individual bonds may cancel out, resulting in a nonpolar molecule.
Some covalent compounds do not dissolve in water because they may lack polar groups or have strong intermolecular forces that make them incompatible with water molecules. Water is a polar solvent, so for a covalent compound to dissolve in water, it often needs to have polar or ionic characteristics for effective interactions with water molecules.
Isopropyl alcohol contains both polar covalent bonds and hydrogen bonds. The oxygen and hydroxyl group in isopropyl alcohol create polar covalent bonds, while the hydrogen atom in the hydroxyl group can participate in hydrogen bonding with other molecules.
Nonpolar molecules are molecules that shares electrons equally and does not have oppositely charged ends. Polar molecules are molecules with a slightly positive end and a slightly negative end as a result of electrons being shared unequally.
Some examples of molecules containing two covalent bonds are oxygen (O2), nitrogen (N2), hydrogen (H2), and carbon dioxide (CO2). These molecules have two atoms bonded together by sharing a pair of electrons in a covalent bond.
Some household items that contain non-polar covalent bonds are cooking oil, plastic containers, and gasoline. These substances consist of molecules with similar electronegativities, leading to shared electron pairs and non-polar covalent bonds.
Polar molecules typically do not conduct electricity as well as ionic molecules. This is because charges in polar molecules due to unequal sharing of electrons are not as strong as the charges on ions
Trinitrotoluene, commonly known as TNT, contains polar covalent bonds where electrons are shared unequally between atoms. This makes TNT a polar molecule despite having symmetrical structures due to the presence of electron-withdrawing nitro groups, making it soluble in polar solvents.
Acids are all polar covalent to some extent. Probably the most common polar covalent compound is water, H2O. Some other examples are ammonia, NH3, boron trifluoride, BF3, and hydrogen fluoride, HF. Basically, any two atoms with a percentage of ionic character (electronegativity difference) between 5% and 50% will form polar covalent bonds.
Some salts may be, but typically they are not.