Properties of Water and pH Study Guide

Answer the questions listed below. You can click here to download a word processing document with the questions. Your notes on water will be helpful as you complete this assignment. Place the completed assignment in your notebook.

 

The Water Molecule

image of water molecule

 

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1. Is the following sentence true or false? A water molecule is neutral

2. Why is a water molecule polar?
3.
Write the letter of each sentence that is true about hydrogen bonds. 

a. A hydrogen bond is stronger than an ionic bond.

b. The attraction between the hydrogen atom on one water molecule and the oxygen atom on another water molecule is an example.

c. A hydrogen bond is stronger than a covalent bond.

d. They are the strongest bonds that form between molecules.

  

FORMS OF ATTRACTION

image of beads of water on grass blade

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4.
Complete the table about forms of attraction.

Form of Attraction

Definition

Cohesion

 ?

Adhesion

 ?

  

5. Why is water extremely cohesive
6.
What is the rise of water in a narrow tube against the force of gravity called?
7.
How does capillary action affect plants

 

Solutions and Suspensions

8. What is a mixture?
9.
What is a mixture of two or more substances in which the molecules of the substances are evenly mixed called?
10.
The greatest solvent in the world is what? (Hint: It's also known as a universal solvent.)
11.
What is a suspension
12.
Complete the table about substances in solutions.

 

SUBSTANCES IN SOLUTIONS

Substance

Definition

Saltwater Solution

Solute

 ?

 ?

 ?

 ?

Water

 

 

Acids, Bases, and pH

pH scale and link to EPA information about pH related facts

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13. Water molecules can dissociate to form what?
14.
Why is water neutral despite the production of hydrogen ions and hydroxide ions
15.
What does the pH scale indicate?
16.
On the pH scale, in which direction do solutions become increasingly acidic and in which direction do they become basic?
17.
How many more H+ ions does a solution with a pH of 4 have than a solution with a pH of 5?


18.
List the letter of each sentence that is true about acids. 

a. Acidic solutions have pH values below 7.

b. An acid is any compound that forms H+ ions in solution.

c. Strong acids have pH values ranging from 11 to 14.

d. Acidic solutions contain higher concentrations of H+ ions than pure water.


19.
List the letter of each sentence that is true about bases. 

a. Alkaline solutions have pH values below 7.

b. A base is a compound that produces OH ions in solution.

c. Strong bases have pH values ranging from 11 to 14.

d. Basic solutions contain lower concentrations of H + ions than pure water.


20.
What are buffers