Water And pH

Question 1

What gives water much of its unique characteristics ?

Answer 1

Hydrogen bonds

Question 2

What are the 4 properties of water?

Answer 2

1. Water is an excellent polar solvent
2. Water has cohension
3. Water has high heat capacity
4. Water has high heat vaporization

Question 3

Is water polar or non polar?

Answer 3

Polar

Question 4

What do polar molecules dissolve in?

Answer 4

Water

Question 5

What makes water the best polar solvent?

Answer 5

Its abilityto formhydrogen bonds with other molecules

Question 6

What is a solution?

Answer 6

Two substances that are mixed together. One of them is called the solute and the other is the solvent

Question 7

In sugar water which substance is the solute and which is the solvent?

Answer 7

Sugar is the solute and water is the solvent

Question 8

What is a solute?

Answer 8

The substance to be dissolved

Question 9

What is a solvent?

Answer 9

The substance doing the dissolving

Question 10

What is cohesion ?

Answer 10

Gives water the capacity to resist breaking under tension

Question 11

Why is cohesion so important?

Answer 11

Allows blood to move easier in the blood vessels

Question 12

What happens when you increase the temperature of something?

Answer 12

The molecules in it move faster, hydrogen bonds keep the water molecules in place so it takes lots of energy to break the bonds and heat the water

Question 13

What happens to hydrogen bonds when water changes from liquid to vapor?

Answer 13

Hydrogen bonds must be broken

Question 14

Sweat is an example of which property of water?

Answer 14

High heat of vaporization

Question 15

What is an acid?

Answer 15

Substances that donates hydrogen ions when in a solution

Question 16

What is a base?

Answer 16

Substances that accept hydrogen ions when in solution (sometimes we say that bases release OH- hydroxyl ions)

Question 17

Ph is described as having a _____ relationship

Answer 17

Inverse

Question 18

Anything below 7 on ph scale is _______

Answer 18

Acidic

Question 19

The higher the ph the _______ the concentration of H+

Answer 19

Lower

Question 20

True or false: The higher the ph solution has the higher the H+ concentration

Answer 20

False

Question 21

Is a ph of 8 acidic or basic?

Answer 21

Basic

Question 22

The H+ concentration of a solution with a pH of 4 is\_\_\_\_\_\_ (higher/lower) than a solution of 2
A. 10x higher
B. 100x higher
C. 10x lower
D. 100x lower

Answer 22

D. 100x lower

Question 23

What is the job of a buffer?

Answer 23

Prevent dramatic changes in pH, remove excess H+ solutions when concentrations of H+ increase, add H+ when concentratioons of H+ decrease

Question 24

In salt water which is considered the solute?

Answer 24

Salt

Question 25

Substances that donate hydrogen ions when in a solution are:
A. Bases
B. Acids

Answer 25

Acids