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BIO120-Water-Life
BC-Water and Life
| Term | Definition |
|---|---|
| Which of the properties of water are due to the polarity of the water molecule? | ALL of the properties. |
| Water is a _______ (polar or non-polar) molecule. | Polar |
| In the water molecule, electrons spend more time around the (oxygen or hydrogen) end of the molecule? | Oxygen |
| Which property of water results in a high surface tension? | Cohesion |
| The attraction between the plant cell wall and the water molecule is termed: | Adhesion |
| Heat is _______ (absorbed or released) when hydrogen bonds between water molecules are formed? | Released |
| Heat is _______ (absorbed or released) when hydrogen bonds between water molecules are broken? | Absorbed |
| _______ bonding among water molecules allow water to moderate temperature fluctuations. | Hydrogen |
| Water has a _______ (high or low) heat of vaporization. | High |
| Solid water (ice) is ______ (more or less) dense than liquid water because the molecules are locked into a crystalline lattice. | Less |
| A liquid that is a completely homogenous mixture is known as a: | Solution |
| The dissolving agent of a solution is the _____. | Solvent |
| The substance being dissolved in a solution is the _____. | Solute |
| When a compound like salt is dissolved in water, each ionic compound is surrounded by water molecules known as: | Spheres of hydration |
| Substances that have an affinity (water loving) for water are_______ and _______. | Polar and hydrophilic |
| Substances that do not have an affinity (water hating) for water are_______ and _______. | Non-polar and hydrophobic |
| OH- is known as a _______. | Hydroxide ion. |
| H+ is known as a _______. | Hydrogen ion. |
| The pH scale runs from zero to : | 14 |
| If the pH value is 7 the solution is considered: | neutral |
| If the pH value is greater than 7 the solution is considered: | basic (or alkaline) |
| If the pH value is less than 7 the solution is considered: | acidic |
| If the pH = 4, then the pOH is = ? | 10 |
| If the pOH = 6, then the pH is = ? | 8 |
| If the Hydrogen ion concentration = 1 x 10 -10 M, then the pH is = ? | 10 |
| If the Hydrogen ion concentration = 1 x 10 -10 M, then the pOH is = ? | 4 |
| A substance that increases the hydrogen ion concentration in a solution is a(n) _______. | Acid |
| Acids are substances which ________hydrogen ions. | Release |
| A substance that decreases the hydrogen ion concentration in a solution is a(n) _______. | Base |
| Bases are substances which ________hydrogen ions. | Accept |
| Substances which minimize changes in concentrations of hydrogen and hydroxide ions are known as : | Buffers |
| What is one of the main products of the burning of fossil fuels? | Carbon dioxide |
| When carbon dioxide is dissolved in seawater and forms carbonic acid, it is called: | Ocean acidification |
Created by:
callen-pbsc
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