Explain the following. Presence of hydrogen bonds between water molecules. The hydrogen bond exists due to the presence of the hydrogen atom between two that are high electronegative; in this case these two atoms are the oxygen atoms; one of these oxygen atoms is from the same molecule of the hydrogen and the other one from a neighboring molecule. Pure water doesn't affect litmus paper dye. This is because, when water is ionized, the positive H ions produced are equal to the negative OH ions. Although sugar is a covalent compound, it dissolves in water. The sugar molecules dissolve in water due to the formation of hydrogen bonds between the water molecules and the sugar molecules. Water has high melting point and boiling point. The abnormality of the boiling point and melting point of water is due to the presence of hydrogen bonds. The hydrogen bonds takes extra amount of heat energy to be broken first, then the molecules get more heat energy and increase the spaces between the water molecules and change from ice to water in melting process or from water to steam in boiling process. Two equal masses of pure water, one of them is at 20°C and the other is at 2°C. Which of them has the larger volume? Why? The one at 2°C has larger volume. This because after 4°C, the density of water starts to decrease The molecules of water lose amount of heat energy and start to move slowly, making it easier for them to form hydrogen bonds. Their crystalline shape now is open and hexagonal which increases their volume.
Explain the following. Presence of hydrogen bonds between water molecules. The hydrogen bond exists due to the presence of the hydrogen atom between two that are high electronegative; in this case these two atoms are the oxygen atoms; one of these oxygen atoms is from the same molecule of the hydrogen and the other one from a neighboring molecule. Pure water doesn't affect litmus paper dye. This is because, when water is ionized, the positive H ions produced are equal to the negative OH ions. Although sugar is a covalent compound, it dissolves in water. The sugar molecules dissolve in water due to the formation of hydrogen bonds between the water molecules and the sugar molecules. Water has high melting point and boiling point. The abnormality of the boiling point and melting point of water is due to the presence of hydrogen bonds. The hydrogen bonds takes extra amount of heat energy to be broken first, then the molecules get more heat energy and increase the spaces between the water molecules and change from ice to water in melting process or from water to steam in boiling process. Two equal masses of pure water, one of them is at 20°C and the other is at 2°C. Which of them has the larger volume? Why? The one at 2°C has larger volume. This because after 4°C, the density of water starts to decrease The molecules of water lose amount of heat energy and start to move slowly, making it easier for them to form hydrogen bonds. Their crystalline shape now is open and hexagonal which increases their volume.
1-6-Assignment-TE-Properties-of-Water.docx