Shared Flashcard Set

Details

Physical Science
IDS 2403 Conceptual Phys Sci Ch. 16
34
Science
Undergraduate 2
07/02/2013

Additional Science Flashcards

 


 

Cards

Term
Pure substance
Definition
A material consisting of only one type of element or compound
Term

 

Mixture

Definition

A collection of two or more pure substances


-
can be separated by physical means

Term

True or False:

 

Most materials are mixtures

Definition
True
Term

Pure materials consist of ______ element or compound.


Give examples:



Definition

a single


Examples:

Element:                            Compound:

Gold (Au)                             Salt (NaCl)

Sulfur (S8)                           Carbon Dioxide (CO2)

Nitrogen (N2)                       Ammonia (NH3)


Term

Impure materials consist of _____ elements or compounds and can be______ or ______.


Give examples:

Definition

two or more

Examples:


Homogenous:                               Heterogeneous:

(solutions)                                      Sand in water
Air (N2, O2)                                   Oil and water
Salt Water (NaCl, H2O)                  Sand and salt  

White Gold (Au, Pd)                    

(suspensions)

Milk (water, solid proteins)

Blood (water, solid proteins)

Fog (air, tiny water droplets)

Term

 

•                          True or False:

In heterogeneous mixtures, the different components can be seen as individual substances.
Definition
True
Term

True or False:

 

 

 

In homogenous mixtures, the different components can be seen as individual substances.
Definition
False
Term

 

Solution:
Definition
Homogenous mixture in which all components are in the same phase.
Term

 

Suspension
Definition
Homogenous mixture in which different components are in different phases.
Term

 

Is the air in your house a homogeneous or a heterogeneous mixture?

 

A.  Homogeneous, because it is mixed very well.

B.  Heterogeneous, because of the dust particles it contains.

C.  Homogeneous, because it is all at the same temperature.

D.  Heterogeneous, because it consists of different types of molecules.

Definition

 

B.  Heterogeneous, because of the dust particles it contains.

Term
Solvent:
Definition
The major component of a solution.
Term

 

Solute:

Definition
The minor components of a solution.
Term

 

Saturated:

Definition
Said of a solution in which no more solute will dissolve.
Term

 

Concentration:

Definition
A measure of the amount of solute dissolved in solution.
Term

Concentration =

 

A.  Solute

    Solution

 

B. Solution

     Solute

Definition

A.    Solute

      Solution

Term

A homogenous mixture consisting of ions or molecules:

A. Solvent

B. Solution

C. Solute

D. Concentration

Definition
B. Solution
Term

When a teaspoon of sugar is mixed in 1L of water, teh sugar is the ____ and the water is the ____:

 

A. solvent, concentration

B. solute, dilute

C. solute, solvent

D. concentration, solvent

Definition
C. solute, solvent
Term

What is the solvent it the gaseous solution we call air?

 

 

Definition

Nitrogen,

 

because it is the component that is present in the geratest quantity

Term

When the solute is the greater amount in the solution, we call the solution:

 

A. diluted

B. concentrated

Definition
B. concentrated
Term

When the solute is the lesser amount in the solution, we call the solution:

 

 

A. diluted

B. concentrated

Definition
A. diluted
Term

 

Mole: 

Definition

A super-large number, 6.02 x 1023, used to measure numbers of atoms or molecules

(a.k.a. Avogadro’s number.)

Term

The formula mass of a substance expressed in grams contains one mole:

Substance                         Formula Mass

Carbon, C                                   12

Oxygen, O2                                32

Carbon dioxide, CO2                   44

Sucrose, C12H22O11                342                    How many moles of Carbon in

                                                                         12 grams of Carbon?

Definition
1 mole
Term

Water, H2O, has a formula mass of 18. How many moles of water are there in 18 grams of water?

 

A.  0.5 moles

B.1 mole
C.9 moles
D.18 moles
Definition
B.1 mole
Term
Molarity
Definition

number of moles of solute per liters of a solution

 

Molarity =    Moles of Solute

                 Liters of Solution

Term

A "mole" of a unit equals:

 

 

Definition

6.02 x 1023 

of that unit

Term

How many grams of water, H2O, are there in 2 moles of water?

 

A.  1 gram

B.9 grams
C.18 grams
D.36 grams
Definition
D.36 grams
Term

 

ppm:

Definition

A unit of concentration expressed in milligrams solute in liters of solution.


 

1 ppm   =         1 Part Solute

                1,000,000 parts solution

Term

 

Precipitate:

Definition
Solute that comes out of solution.
Term

The amount of oxygen, O2, dissolved in the waters of the arctic ocean is greater, about equal to, or less than the amount of oxygen dissolved in warm tropical waters?

 

A.  Greater than

B.About equal
C.Less than
D.It depends
Definition

A. Greater than

 

 

Explanation:

The solubility of oxygen in water decreases with increasing temperature. As a consequence, cold polar oceans tend to be more fertile than warmer tropical waters.

Term
Solubility
Definition
The ability of a solute to dissolve in a solvent
Term
What property of soaps and detergents attracts "grime"?
Definition
The nonpolar property (part) attracts grime
Term

 

Soap attracts “grime” by which type of molecular interaction?


A. Dipoledipole

B. Induced dipoleinduced dipole.

C. Hydrogen bonding

D. Dipoleinduced dipole.

Definition
B. Induced dipoleinduced dipole
Term

 

Which of the following is not a method of disinfecting drinking water?

 

A. Chlorine gas

B. Boiling

C. Aeration

D. Iodine tablets

Definition

C. Aeration

Term

Water that is safe to drink is called:

 

A. Drinkable

B. Potable

C. Safe water

D. chlorinated

Definition
B. potable
Supporting users have an ad free experience!