What's your favourite drink?

To be honest, my favourite drink is everything except water. I don't really like water. Yet, water is essential to all living matters.

AGUA! 

 #Waterisimportant
1. Water is the only common substance that exists in the natural world in all three physical states of matter: solid ice, liquid water, and water vapor.
Water is polar because of the difference in electronegativity between hydrogen and oxygen. The highly electronegative oxygen atom attracts electrons or negative charge to it, making the region around the oxygen more negative than the areas around the two hydrogen atoms. Therefore, the charge is unevenly distributed.  

2. Hydrogen bonds

Due to the polarity of water molecules, the small negative charge on each oxygen atoms is attracted to the hydrogen atoms of other water molecules. These attractions are called hydrogen bonds. 

3. Properties of water

1）Organisms depend on the cohesion of water molecules. The hydrogen bonds joining water molecules are weak, about 1/20 as strong as covalent bonds. They form, break, and reform with great frequency. Each hydrogen bond lasts only a few trillionths of a second. At any instant, a substantial percentage of all water molecules are bonded to their neighbors, creating a high level of structure. Collectively, hydrogen bonds hold water together, a phenomenon called cohesion.

2)  Adhesion, clinging of one substance to another, as water adheres to the wall of the vessels.

3) Surface tension, a measure of the force necessary to stretch or break the surface of a liquid, is related to cohesion. Water has a greater surface tension than most other liquids because hydrogen bonds among surface water molecules resist stretching or breaking the surface.

4) Water moderates temperatures on earth. Water stabilizes air temperatures by absorbing heat from warmer air and releasing heat to cooler air. Water can absorb or release relatively large amounts of heat with only a slight change in its own temperature. This is due to the molecular motions between water molecules. 

      The faster a molecule moves, the more kinetic energy it has. As we known heat is a measure of the total quantity of kinetic energy due to molecular motion in a body of matter.

      Temperature measures the intensity of heat in a body of matter due to the average kinetic energy of molecules. As the average speed of molecules increases, a thermometer will record an increase in temperature.

Extra questions: 

What does cabbage have in it that enables it to be a pH indicator. 

Cabbage contains a pigment molecule called flavin (an anthocyanin).Very acidic solutions will turn anthocyanin a red color. Neutral solutions result in a purplish color. Basic solutions appear in greenish-yellow. This is the reason why cabbage can be used as a pH indicator. 

1. Explain how the chemistry of acid and bases affects the indicator.
2. Explain how acid rain would affect red cabbage growth and development.

#1: 
An acid-base indicator is a weak acid or a weak base. The undissociated form of the indicator is a different color than the iogenic form of the indicator. An Indicator does not change color from pure acid to pure base at specific hydrogen ion concentration, but rather, color change occurs over a range of hydrogen ion concentrations. This range is termed the color change interval. It is expressed as a pH range.

Weak acids are titrated in the presence of indicators which change under slightly alkaline conditions. Weak bases should be titrated in the presence of indicators which change under slightly acidic conditions. 

#2:

Since cabbages are pH indicators, and acidic solutions will turn the color of cabbages into red. Therefore, acid rain will increase the growth of red cabbages. Yet, too much acidic solutions will destroy cabbages. Red cabbages would not survive long enough through acid rain.