Many compounds which we need them for our body are hydrophilic therefore it could dissolve into a water or blood so that it could fluid around our body and take place their functions.
Q. why is the hydrogen bond important for us?
Because of hydrogen bonding, the water molecule is able to appear its unique but important characteristics.
Q. what are the important characteristics of water?
Cohesion, adhesion, high specific heat capacity, floating when it is solidified, ect.
5 main facts in this chapter
1. H2O has hydrogen bonds which are significantly important characteristic for biology and living things.
2. Its hydrogen bond as itself is nothing but when it gathers their power, it could have enough power to attract so many things therefore it could dissolve so many things into.
3. Water when it is ice form, it is floating. Because the hydrogen bond become stiff and its distance are further, its density gets lower. Since it floats, the sub-marine animals can consist their lives.
4. When our body has too much acid or base, the buffer active such as it starts balancing the pH level by accepting H+ when it is too much, or releasing H+ when it is too little.
5. pH of a solution is defined as the negative logarithm or the hydrogen ion concentration. A solution of pH 3 is not twice as acidic as a solution of pH 6 but a thousand times more acidic.
pH scale is telling me that how acidic it is. If a substance has many H+ in side, it will be less than 7 and getting closer to the zero. We should not forget the fact that one difference level of pH scale is not 1 more acidic; it is 10 times more acidic.10 key terms
1. Cohesion is a phenomenon which the hydrogen bonds hold the substance together
2.Adhesion is the clinging of one substance to another, also plays a role.
3.Temperature is a measure of heat intensity that represents the average kinetic energy of the molecules, regardless of volume.
4.Solution is a liquid that is a completely homogeneous mixture of two or more substances.
5.Solvent is the dissolving agent of a solution
6.Solute is the substance that is dissolved.
7.An aqueous solution is one in which water is the solvent.
8.Hydrophilic is any substance that has an affinity for water.
9.Hydrophobic is any substances that do not have affinity for water.
10.Buffer is substances that minimize changes in the concentration of H+ and OH- in a solution.
video - hydrogen bonding
http://www.youtube.com/watch?v=58Vn1dldevE
water is the very basic and familer substance since we are born. Water is not simply, we have to drink every day, it has more characteristic that we cannot ignore for consisting our lives. Water's hydrogen bonds make a unique and universal solvent.
Its cohesion, adhesion are so imortant to consist the plants served H2O into everywhere against the gravity. Also its hydrogen bond, it can dissolve a lot of compounds which are in our body or which we have to have into our body. water's significant solidifying characteristic also very important for the sub-marine animals and therefore we do not freeze to die. If the water did not have the hydrogen bonding significant, we are no longer to survive.
Now I understand why people look for the other planet's existance of water, it is because water is connected to the surviving living things.
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