Chemistry 11

Today we took notes and watched a video on the new unit (Unit 5):  Atomic Theory

We also took some time to work on the Unit 4 Review.   Here are some selected answers to qestions:

2)  Change in temperature, change in colour, change of state, precipitate formed, gas given off or smell given off.

4)  Bond forming releases energy.

5b)    SiF₄  +  8NaOH Na₄SiO₄  + 4NaF + 4H₂O

6 and 7a)  Decomposition:   Ba(ClO₃)_2(s)  BaCl_2(s)   +  3O_2(g)

6 and 7c)  Double Replacement (Acid/Base Neutralization) 

H₂C₂O₄  +  Mg(OH)₂ 2H₂O  +  MgC₂O₄ 

8a)  Zn  +  I₂ ZnI₂

 

9b) 9.8 x 10⁴ g Cl₂      

10a) 1.28 x 10³ L O₂ 

10b) 6.25 mole Na

13) 51.1 g of PbCl2 can be obtained

14) 3.36 g of NH4Cl can be obtained