Question

1. which type of bond forms between water molecules and is responsible for water’s high surface tension? a. ionic bonds b. covalent bonds c. hydrogen bonds d. van der waals bonds 2. in a water molecule (h2o), what type of bond exists between hydrogen and oxygen atoms? a. covalent bond b. ionic bond c. hydrogen bond 3. when salt dissolves in water, what term best describes the salt? a. solution b. solvent c. solute d. suspension 4. which of the following scenarios is an example of cohesion? a. water molecules stick to one another and form a bead b. water sticks to the walls of blood vessels c. water molecules stick to the surface of a mirror 5. what property allows water to stick to glass? e. adhesion f. cohesion g. surface tension h. solubility 6. what causes water molecules to be polar? a. equal sharing of electrons b. the presence of hydrogen bonds c. uneven distribution of electrical charge 5. numbers lower than a 6.8 on the ph scale are a(n) d. neutral e. acidic f. basic 8. in a water molecule, the oxygen atom is a. neutral (no charge) b. both positively and negatively charged c. positively charged d. negatively charged 9. how many hydrogen atoms does each water molecule have? a. 2 b. 3 c. 6 d. 1 10. in a solution, what term describes the total mixture of both solvent and solute? a. compound b. solvent c. solution

Explanation:

1. Hydrogen bonds between water - molecules give water high surface - tension.
2. In a water molecule, hydrogen and oxygen are joined by covalent bonds.
3. When salt dissolves in water, salt is the solute.
4. Water molecules sticking to one another to form a bead is an example of cohesion.
5. Adhesion allows water to stick to glass.
6. Uneven distribution of electrical charge makes water molecules polar.
7. Numbers lower than 6.8 on the pH scale are acidic.
8. In a water molecule, the oxygen atom is negatively charged.
9. Each water molecule has 2 hydrogen atoms.
10. The total mixture of solvent and solute is called a solution.

Answer:

1. c. Hydrogen bonds
2. a. Covalent bond
3. c. Solute
4. a. water molecules stick to one another and form a bead
5. e. Adhesion
6. c. Uneven distribution of electrical charge
7. e. acidic
8. d. negatively charged
9. a. 2
10. c. Solution