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Section: Water

QuestionAnswer
What type of bond does H20 form? Polar Covalent.
What happens in a polar covalent bond? The electrons shared between the atoms are closer to the nucleus of the more electronegative atom. In water, the electrons tend to stay near the oxygen atom.
What region of water is slightly positive, and which is slightly negative? Oxygen: slightly negative. Hydrogen: slightly positive.
How do water molecules bond with each other? Hydrogen bonds.
Which bond is stronger: polar covalent or hydrogen? Polar Covalent. Hydrogen bonds are constantly breaking, forming, and reforming.
What can happen when 2 water molecules dissociate? The partial charges formed when the bonds break and reform can form 1 hydronium ion (H3O+) and 1 hydroxide ion (OH-).
What kinds of unique properties does water posses? Cohesion, adhesion, surface tension, the ability to dissolve many other materials (universal solvent), and the ability to expand upon freezing, high specific heat, able to moderate the temperature of surrounding air.
What is cohesion? The attraction of two like materials. This refers to the binding of hydrogen bonds that hold water molecules together.
What is adhesion? It can stick (through hydrogen bonds) to other substances.
What is surface tension? Does water have a high or low surface tension? Surface tension refers to measure of the enhanced inter-molecular forces at the surface of a liquid. Water has a high surface tension.
What type of solvent is water? Water is referred to as the universal solvent. Many substances on earth can dissolve in water.
What happens when water freezes? It expands upon freezing, making ice less dense than liquid water.
What is specific heat? Does water have a high or low specific heat? Specific heat is the amount of heat, expressed in calories, needed to raise one gram of a substance by 1°C. Water has a high specific heat.
What states of matter can water be found in? Solid, liquid, and gas.
What is the water cycle? Evaporation, condensation, precipitation, and transpiration.
What are the main sources of energy for the water cycle? The sun and gravity.
Created by: JustEmma
 

 



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