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BSC Chapt. 2
Terms in this set (46)
When H20 is added to a compound i a chemical equation, a new compound can be formed via what type of reaction?
Water is critical to sustain life. One of its major roles is creating and breaking bonds in chemical reactions. Other significant roles of water include.
1. acting as a solvent in the transport of dissolved substances around the body. 2. acting as the medium for white blood cell formation. 3. maintaining body temperature homeostasis. 4. composing up to 30% of the human body.
If the products in a chemical equation include H20, what specific type of reaction is occurring? Is a polymer being made or broken down in this equation?
Adding Nh3 (ammonia) to water makes NH4. What will be the general pH of this new solution and what will happen to the ion concentrations.
10-20% of the body weight in humans is from water
Water bathes organs in fluid, which provides protection and support.
Water is the universal solvent, transporting dissolved substance in bodily fluids.
Water plays a major role in our bodies' chemical reactions.
Water plays a much more important role in plants than in animals, use to the role of water in photosynthesis.
dehydration synthesis reaction C6H12O6+C6H12O6
They have the same # of electrons in their outermost shells.
They have two electron shells
Carbon and Nitrogen
Their outermost electron shell is full.
Helium and Argon
They have one electron shell.
Hydrogen and Helium
They have three electron shells.
Sodium and Chlorine
If you were to create a planet capable of supporting life forms similar to those on earth the necessary elements to in include would be.
CO2, HYDROGEN, O, C6H12O6
Electrons that orbit the nucleus of an atom
randomly move between different shells. have lower potential energy as they move farther from the nucleus.
Carbon 14 has how many neutrons?
Photosynthesis reaction. what occurs during it?
Substances are changed it other substances by the making or breaking of chemical bonds.
A polar covalent bond is created when
bonded atoms have unequal pull on the shared electron, so that the electron spends more time around one atom than the other.
The unequal sharing of electrons between the oxygen and hydrogen atoms within a water molecule makes water a _____ molecule.
As a result of the electron configuration of a water molecule, water is a great _____ because water can break up and surround a _______, as long as it is not ________, dissolving it into the solution.
solvent, solute, nonpolar
The reason water behaves in this manner is because the ____ charge on the hydrogen end of the water moecule is attracted to the negative charge of a polar molecule, while the _____ charge of the water molecule is attracted to the positive side of a polar molecule.
When two atoms are bonded together via electrons, and one of those atoms has a greater pull upon the electrons shared, the bond formed would be.
a polar covalent bond
the property of water that allows the basilisk lizard to run across its surface is
the high surface tension caused by the non-polar qualities of water.
1. Strong chemical bond due to the sharing of electrons. 2. Bonds between hydrogen and oxygen atoms within a water molecule.
1. Electrons are transferred between two atoms creating positively and negatively charged atoms, which are then attracted to one another. 2. Na++Cl__>NaCl
1. Bonds between charged molecules or portions of a molecule. 2. Weak attraction between slightly charged parts of molecules, which are readily broken and reformed. 3. Bonds between water molecules.
Stable blood serum has a pH of around 7.4. The release of bicarbonates as a buffer to maintain this pH in a body with high hydrogen levels would cause the pH to move.
The best summary of the properties of water is
less dense than 0 degrees Celsius than at room temperature, ideal solvent for biological molecules, absorbs considerable heat energy without raising temperature, and high percentage of hydrogen bonds.
The bonds between water are stable.
As temperature drops the bonds between the water molecules are less likely to break.
Ice is denser than liquid water t all temperatures
Th polar covalent bonds between hydrogen and oxygen atoms within a water molecule create a slightly positively and negatively charged ends to the molecule.
A hydrogen atom of one water molecule binds via hydrogen bond to a hydrogen atom of another water molecule.
Bonds between water molecules are stronger than the bonds between atoms within a water molecule.
Water is less dense at 0C compared to 4C
Water provides structural support due to its inability to be compressed.
Turgid pressure in plants.
The cahrged ends of a water molecule allow t to surround a solute in solution.
The temperature of water risrises slowly due to its high specific heat; requiring a lot of energy to convert liquid water to water vapor.
While hydrogen bonds are constantly breaking and reforming, a large percentage of the hydrogen bonds between water molecules exist at all times.
Due to hydrogen bonding, water tends to adhere to surfaces, such as the lining of the digestive tract.
The addition of water can break apart molecules into two smaller molecules.
Water is formed when two molecules come together to form a large molecule
This set is often in folders with...
BIO 201 Homework 1
BSC 120 Chapter 2
Biology Chapter 3: Water
Biology chapter 5
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