Tuesday, January 8

Section 8: For each of the following, calculate the number of grams of these elements.
1) Silicon in 20.0 g SiO₂

2) Calcium in 4.5 g CaCO₃
3)  Hydrogen in 115 g H₃PO_4
4) Magnesium in Mg₃(PO₄)₂

**Recommended review problems - all electron configuration problems

Section 9: 

• Finish your Chapter 7 Worksheet.
• % comp and molecular formula wksht #1,3 
• empirical and molecular formula wksht #1,2,3 (front side) and #1-5 (back side)

**Recommended review packet problems - 37-40

Section 10: Complete page 1 of the green packet (front and back) and #1 on the next page (Chapter 7 Worksheet). You will be having a quiz on Thursday on what we learn this week.

Hydroxide: OH^-                  Permanganate:  MnO₄^-

Bicarbonate: HCO₃^-           Ammonium: NH₄⁺

Carbonate: CO₃^2-               Acetate: C₂H₃O₂^-

Sulfate: SO₄^2-                    Hydrogen Phosphate:    HPO₄^2-

Sulfite: SO₃^2-                    Dichromate: Cr₂O₇^2-

Phosphate: PO₄^3-                

Nitrate:  NO₃^-

Nitrite: NO₂^-

Chlorate: ClO₃^-

Cyanide: CN^-

**Recommended review packet problems for tonight 25-35.

Section 11: In your green packet, complete % comp and molecular formula wksht - front and back.

**Recommended review packet problems - 37-40