Chapter 7
Chapter 8
extra review: challenge problems
Eg and Mg
Polyatomic Ions
100

A change in the physical properties of a substance.

What is a physical change?

100

The major component (higher concentration) in a homogeneous (evenly mixed) solution. 

What is the solvent? 

100

write the electron configuration for Ca





 1s22s22p63s23p64s2


100

5 electron groups: 4 bonding 1 lone pair (include bond angle)

eg:Trigonal bipyramidal

mg: Seesaw <120, <90

100

phosphate

PO43-

200

when a chemical substance is transformed into one or more different substances

what is a chemical change? 

200

The minor component in a homogeneous solution. 

what is the solute?

200

express 254,998 m in Km, Mm, and mm. 

Km- 254.998 Km

Mm-2.54998 x10-1 Mm

mm- 244998x10mm

200

6 electron groups: 5 bonding,1 lone pair 

eg; octahedral

mg: Square pyramidal, <90

200

sulfite

SO32-

300

The reactant that results in the least amount of product. 

What is the limiting reactant?

300

The measure of a concentration of a solution. 

what is molarity?

300

write the lewis structure for BBr3

and determine the central atom's eg and mg. 

eg: trigonal planar

300

2 electron groups

linear, 180

300

Dihydrgen phosphate

H2PO4-

400

Anything that is left over after the reaction. (NOT limiting) 

What is excess reactant?

400

One conducts electricity when dissolves in a solution, one does not. 

what is the difference between an electrolyte and a non-electrolyte?

400

Complete and balence the reaction: CrB2(aq) + Na2CO3 (aq) 

This table is on page 330. 

CrB2(aq) + Na2CO3 (aq) ---> CrCO(s) + 2NaBr (aq)

400

4 electron gropus; 2 bonding 2 lone pairs

eg; tetrahedral

mg : bent

400

nitrite

NO2-

500

Amount of product that can be made based on limiting reactant. 

What is a theoretical yield?

500

A solution in which a large fraction of the dissolved solute exists as ions

What is a strong electrolyte? 

500

to what volume should you dilute 50.0 mL of a 12 M HNO3 solution to obtain a 0.100 M HNO3 solution? 

6.0 L

500

3 electron groups; 1 lone pair 2 bonding

eg; trigonal planar

mg; trigonal pyramidal ,109.5

500

carbonate 

CO32-