water quiz

sugar is more soluble at higher temps. this is mainly because at higher temps 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 sugar molecules

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

carbon dioxide gas dissolves pretty well in water because 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

b. the bond between the carbon and oxygen in the carbon dioxide is polar

alcohol molecules are not as polar as water molecules. if you mixed sucrose in alcohol you might expect the sucrose a. to dissolve better in alcohol b. to dissolve in alcohol not as well as in water c. to dissolve equally well in alcohol and in water

b. to dissolve in alcohol not as well as in water

the chemical formula for the sucrose is C6H12O6. in some parts of the sucrose molecule oxygen is covalently bonded to hydrogen. this makes the sucrose a. bonded like salt b. smaller than a water molecule c. a polar molecule

c. a polar molecule

the solubility of a substance a. is the solvent minus the solute b. is the mass of the substance plus the mass of water it dissolves in c. is the mass of a substance that will dissolve in a certain volume of water at a certain temp

c. is the mass of a substance that will dissolve in a certain volume of water at a certain temp

water is not a good dissolver of oil mainly because a. oil is also a liquid b. oil is thicker than water c. oil molecules are non polar

c. oil molecules are non polar

sodium chloride is made up of sodium ions and chloride ions which bond together in a salt crystal because a. they have the same charge b. they are the same size c. one is the positive and one is negative so they attract

c. one is the positive and one is negative so they attract

sucrose dissolves well in water because 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

c. polar water molecules attract the opposite polar areas of the sucrose molecules

the atoms in a water molecule are held together by covalent bonds. this means that the bonded atoms a. lose protons b. lose electrons c. share electrons

c. share electrons

the water molecule is slightly a. slightly negative near the hydrogen atoms and slightly negative near the end 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

c. slightly negative near the oxygen atom and slightly positive near the hydrogen atoms

water cannot dissolve all substances that are made from ionic bonds. this is prob because 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 to pull them apart

c. some ionic bonds are too strong for the attractions of water to pull them apart

a paper clip can stay on the surface of a sample of water because of waters strong surface tension. waters surface tension is mostly a result of a. waters temp b. the motion of water moleucles c. the attraction of water molecules

c. the attraction of water molecules

water molecules are attracted to each other because 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 water molecule

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

when sucrose dissolves in water 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

c. the water molecules cause the sucrose molecules to separate from one another

dissolving often involves a solid dissolved in a liquid. in this type of dissolving 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

d. the solid is the solute and the liquid is the solvent

in exothermic dissolving

more energy is released when water molecules bond to the solute than is used to pull the solute apart

in endothermic dissolving

more energy is used to pull the solute apart than is released when water molecules bond to the solute

the water molecule is a polar molecule. a water molecule is polar because a. the electrons are shared equally b. oxygen has a stronger attraction for the electrons than hydrogen c. it is very old d. hydrogen atoms have a stronger attraction for the electrons than oxygen

b. oxygen has a stronger attraction for the electrons than hydrogen

water is able to dissolve sodium chloride because a. the polar areas of water molecules attract the oppositely charged ions of sodium and chloride b. the shape of the water molecules pushes the sodium and chloride ions apart c. the oxygen in the water molecule reacts with the sodium and chloride ions

a. the polar areas of water molecules attract the oppositely charged ions of sodium and chloride

a water molecule has the chemical formula H2O. This means that the water molecule is made up of a. two hydrogen atoms and one oxygen atom b. two hydrogen atoms and one hydrogen atom c. two hydrogen atoms and two oxygen atoms d. two molecules of water

a. two hydrogen atoms and one oxygen atom

the amount of gas that can dissolve in water a. increases as the temp of the water increases b. increases as the temp of the water decreases c. does not change when the temp of the water changes

b. increases as the temp of the water decreases

if liquid A is more polar than liquid B you might expect a. liquid a to evaporate faster than liquid B b. liquid A to evaporate more slowly than liquid B c. liquid A and liquid B to evaporate at the same rate

b. liquid A to evaporate more slowly than liquid B