Properties of Water

The partial polarity of water molecules: a. promotes formation of hydrogen bonds b. helps water dissolve nonpolar solutes c. lowers heat of vaporization d. none of these choices is correct e. more than one of the choices is correct

Ice floats on water because:  a. The molecules are closer together in ice than in water b. The molecules are farther apart in ice than in water c. Ice is more dense than water

Water is best described as which of the following?  a. An ion b. A non-polar molecule c. An atom d. A polar molecule e. An element

Individual water molecules bind to each other through:  a. Covalent bonds b. Ionic bonds c. Hydrogen bonds d. Hydrophobic bonds e. Non-polar bonds

Within a single molecule of water, ____ bonds are formed between oxygen and hydrogen.a. Ionic bondsb. Covalent bondsc. Hydrogen bondsd. Hydrophobic bonds

The emergent properties of water (cohesion, high heat capacity, good solvent) come from the fact that water is ______ and ______ hydrogen bond. a. polar, can b. polar, cannot c. non-polar, can d. non-polar, cannot

Cohesion is a property of water in which water molecules tend to stick together.  a. True b. False

A substance in which other substances dissolve is called a solute.  a. True b. False

If ice were more dense than water, then during the winter most organisms living in ponds and lakes in colder climates would become entrapped in ice and freeze.  a. True b. False

Cohesive forces in liquid water occur when a. The H atoms on molecules of H2O hydrogen bond to other H atoms on adjacent molecules of H2O. b. The H atoms on molecules of H2O hydrogen bond to O atoms on adjacent molecules of H2O. c. The atoms on molecules of H2O hydrogen bond to other O atoms on adjacent molecules of H2O.

Water is the most abundant molecule within cells. Describe the molecular properties of its structure as it is important for predicting its interaction with other molecules within the cell.

Define the terms hydrophobic and hydrophilic. Which of the two form hydrogen bonds with the surrounding water molecules? What does this mean in terms of solubility in water?

List water's four properties that make it such a good solvent.

Our stock solution of CaCl2 is at a concentration of 500mM. How much stock CaCl2 must be added to 10mL of blood to achieve a final concentration of 50mM.

Using your favorite method, find the MOLARITY of a fructose solution C6H12O6 containing 400g of fructose in 5000mL of water.