Chemistry March 31, & April 1, 2014

•OBJECTIVE: Student  will create foldables and solve several questions I.O.T. improve their understanding of stoichiometry.

•W.O.D. Divisive-causing conflict, opposition

•WARM-UP

•Complete page 379 #42a

Classwork

Foldables

Page 1

1.    Define stoichiometry.

2.    Interpret the following equation in terms of particles, moles and mass

4Al_(s)  +   3O_2(g) -------------- 2Al₂O_3(s)

Page 2

Mole-to-mole

1.    Balance the equation and then solve the problem

CaC₂  +  H₂O_(l) ----------- Ca(OH)_2(aq) +   C₂H_2(g)

If 5.5moles of calcium carbide (CaC₂) reacts with an excess of water, how many moles of acetylene (C₂H₂) will be produced?

Page 3

Mole-to-mass

The exothermic reaction between liquid hydrazine (N₂H₂) and liquid hydrogen peroxide (H₂O₂) is used to fuel rockets. The products of this reaction are nitrogen gas and water.

1.    Write a balanced equation for the chemical reaction.

2.    How many grams of hydrazine are needed to produce 10 moles nitrogen gas?

Page 4

Chloroform (CHCl3) an important solvent, is produced by a reaction between methane and chlorine.

CH_4(g)  +  Cl_2(g) ----------- CHCl_3(g)  +  HCl_(g)

1.    How many grams of CH₄ is needed to produce 50 g of CHCl₃?