Water Molecules And Dissolving Question Preview (ID: 59201)

a) Bonded like salt

b) Smaller than a water molecule

c) A polar molecule

d) Act like a liquid

a) Some water molecules are not as strong as others

b) Water needs to be stirred to dissolve all ionic substances

c) Some ionic bonds are too strong for the attractions of water molecules to pull them apart

d) Water needs to be heated to dissolve all ionic substances

a) The polar areas of water molecules attract the oppositely charged ions of sodium chloride

b) The shape of the water molecules pushes the sodium and chloride ions apart

c) The oxygen in the water molecules reacts with the sodium and chloride ions

d) Water molecules and sodium chloride are covalently bonded

a) They have the same charge

b) They are the same size

c) One is positive and one is negative so they attract

d) They both have protons and electrons

a) Water’s temperature

b) The motion of water molecules

c) The attraction of water molecules

d) The impurities in the water

a) They are all positively charged

b) Each water molecule has the same number of protons as electrons

c) The positive area of one water molecule is attracted to the negative area of another

d) All water molecules are neutral

a) Slightly negative near the hydrogen atoms and slightly positive near the oxygen atom

b) Slightly positive in all areas of the molecule

c) Slightly negative near the oxygen atom and slightly positive near the hydrogen atoms

d) The same charge in all areas of the molecule

a) Lose protons

b) Lose electrons

c) Share electrons

d) Switch neutrons

a) The electrons are shared equally

b) Oxygen has a stronger attraction for electrons than hydrogen

c) It is very cold

d) Hydrogen atoms have a stronger attraction for electrons than oxygen

a) Two hydrogen atoms and one oxygen atom

b) Two oxygen atoms and one hydrogen atom

c) Two hydrogen atoms and two oxygen atoms

d) Two molecules of water

a) Water is usually warm

b) Sucrose is used to make sweet beverages

c) Polar water molecules attract the opposite polar areas of the sucrose molecules

d) Polar water molecules attract the carbon atoms in the sucrose molecules

a) The sucrose molecules break apart into individual atoms

b) The water molecules covalently bond to the sucrose molecules

c) The water molecules cause the sucrose molecules to separate from one another

d) Each sucrose molecule breaks in half

a) To dissolve better in alcohol than in water

b) To dissolve in alcohol not as well as in water

c) To dissolve equally well in alcohol and in water

d) To increase in size

a) The solid is the solvent

b) The liquid is the solute

c) The solid is both the solvent and the solute

d) The solid is the solute and the liquid is the solvent

a) Sugar and water molecules move slower and their interactions make the sugar molecules stay together longer

b) Sugar and water molecules move faster and their interactions make the sugar molecules separate from one another

c) Water molecules spread out more, making more room for the sugar molecules

d) Water molecules actually come apart into separate atoms and react with the sugar

a) Oil is also a liquid

b) Oil is thicker than water

c) Oil molecules are non-polar

d) Oil is colder than water

a) The molecules of a gas are far apart compared to the molecules of a liquid

b) The bond between the carbon and oxygen in the carbon dioxide is polar

c) Water can dissolve anything with carbon

d) Water molecules are non-polar

a) Increases as the temperature of the water increases

b) Increases as the temperature of the water decreases

c) Does not change when the temperature of the water changes

d) Does not depend on the type of gas

a) More energy is released when water molecules bond to the solute than is used to pull the solute apart.

b) More energy is used to pull the solute apart than is released when water molecules bond to the solute.

c) A gas is always produced

d) The temperature does not change

a) More energy is released when water molecules bond to the solute than is used to pull the solute apart.

b) More energy is used to pull the solute apart than is released when water molecules bond to the solute.

c) Water molecules break apart into atoms

d) The temperature does not change