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Water Basics PhysicalProperties

Properties2 Structure of Water Bonding and

Reactions

FINAL QUESTIONS

Water Basics -100

Answer: Hydrogen and oxygen

Question: What two elements make up water?

Water Basics - 200

Answer: Group 1, Period 1 (Hydrogen)Group 16, Period 2 (Oxygen)

Question: Where are the elements that make upwater located on the periodic table?

Water Basics - 300

Question: Water makes up what percent of the Earth’s surface?

Answer: 75%

Water Basics - 400

Answer: 60- 70%

Question: What percent of the human body is made up of water?

Water Basics- 500

Answer: nonmetal

Question: Both elements that make up waterwould be classified as what on the periodic table?

Physical Properties - 100

Answer: 100oC

Question: Boiling point is a physical propertyof water. What is the boiling point for water?

Physical Properties - 200

Answer: Freezing/melting point of water

Question: 0oC is a physical property of water. Which property is it?

Physical Properties - 300

Answer: Density. Oil is less dense than water.

Question: When an oil spill occurs on the ocean. The oil does not sink into the ocean nor does it mix with the water. What property of water is this due to?

Physical Properties - 400

Answer: Surface tension

Question: A paper clip, and needle can float on water. You can add numerous pennies to an apparent full glass of water without it overflowing. A water strider can “walk” across the water. What property of water is this due to?

Physical Properties - 500

Answer: Specific heat (Water has a high specific heat.This means more heat energy is required to increase the temperature of water than something with low specific heat capacity.).

Question: When you touched the flaming snowball, you had to wet your hands in water. What property of water enabled you to touch the flame without getting burned?

Properties2 - 100

Answer: gas

Question: When water is in the form of steam,what state of matter is it in?

Properties2 - 200

Answer: electrolysis (a chemical property of water)

Question: When we took water and separatedit into hydrogen and oxygen and usedthe hydrogen gas to power our boat/cars what was that process called?

Properties2 - 300

Answer: Oxidation

Question: The Statue of Liberty is made of the element copper. But instead of having the color of a penny (also made of copper), itis the color green. What chemical property of water caused this?

Properties2 - 400

Answer: Sugar: Solute (element/Compound that is dissolved in a solvent)Water: Solvent (part of solution that dissolves other solutes)

Question: Solubility is the ability to dissolve solutes in a solvent at a given temperature.When you add sugar to water and mix it together, which is the solute and which is thesolvent?

Properties2 - 500

Answer: A homogenous mixture.A heterogeneous mixture has different layers while a homogeneous mixture looks the same throughout (which is what salt water does).

Question: Is salt water an example of a heterogeneous mixture or a homogenousMixture? Why?

Structure of Water- 100

Answer: H20

Question: What is the chemical formula forwater?

Structure of Water - 200

Answer: Hydrogen: P:1 N:0 E: 1 (Water has two of these)Oxygen: P: 8 N:8 E: 8 Thus, H20 would have P: 10 N:8 E:10

Question: How many protons, neutrons andelectrons does ONE molecule of water have?

Structure of Water - 300

Answer: Oxygen: Number of Energy Levels: 2 First Energy Level: 2 Second Energy Level: 6Hydrogen: Number of Energy Levels: 1First Energy Level: 1

Question: What is the Bohr diagram for eachelement that makes up water?

Structure of Water - 400

Answer:

Question: What is the Lewis dot structurefor water?

Structure of Water - 500

Answer: valence electrons

Question: When you draw the Lewis dot structure for water, what is the name of theelectrons you include?

Bonding and Reactions - 100

Answer: Because water shares electrons instead of stealing them = H+1 + O-2 = H2O

Question: Why is water not an ionic bond?

Bonding and Reactions - 200

Answer: covalent bond (sharing of electrons)

Question: What kind of bond does water have?

Bonding and Reactions - 300

Answer: EXOTHERMIC (Exothermic reactions release energy in the form of heat, light or sound. Exothermic reactions may produce heat or be explosive.

Question: What type of reaction did you seein class when ethanol and calcium acetatewere combined together to make the flaming snowball (combustion/ energy is being released)?

Bonding and Reactions - 400

Answer: Photosynthesis is an example of an endothermic chemical reaction. In this process, plants use the energy from the sun to convert carbon dioxide and water into glucose and oxygen. This reaction requires 15MJ of energy (sunlight) for every kilogram of glucose that is produced: sunlight + 6CO2(g) + H2O(l) = C6H12O6(aq) + 6O2(g)

Question: When photosynthesishappens, what type of reaction occurs ? (energy is being absorbed)

Bonding and Reactions- 500

Answer: A catalyst. (A catalyst is a compound that speeds chemical reactions without being consumed. Water is used as a catalyst inexplosives. Detonations of high explosives made up of oxygen and hydrogen produce water at thousands of degrees Kelvin and up to 100,000 atmospheres of pressure, similar to conditions in the interiors of giant planets.)

Question: Water can be used to increase the rate of a reaction. What is it called when you add something to a reaction to cause the reaction rate to increase?

FINAL QUESTIONS…AKA..Pop Quiz

Please record your answer on your own sheet of paper and turn it into me when you are finished. (Yes, this will be a quiz grade! I hope you were paying attention during the review!)

1. List 4 physical properties of water and one chemical property of water. (You may list all 10 properties of water for extra credit.)

2. Explain the difference between a endothermic reaction and an exothermic reaction. Is a exploding firework a endothermic reaction or exothermic reaction? (For extra credit you can list an example of each type of reaction from our review or from your own background knowledge.)

3. Write the chemical formula for water and draw the Lewis dot structure for water.

4. What states of matter can water exist in?