Ch. 4, 7, 8, & 18 chemical names, equation, & reactions test [55 points]

 

1. fill-in the table [10 points]

 

name

Symbol

Calcium hydroxide

 

Potassium bicarbonate

 

 

Sn(NO3)4

 

PbS

 

N2Cl6

 

2. Balance the following chemical equation using the lowest ratio of integers. Add “1” as appropriate. [17 points]

a. ____ Mg3N2 + _____ H2O  --> _____ Mg(OH)2 + _____ NH3

b. _____ Zn(NO3)2 + _____ Cu --> _____ CuNO3 + Zn

c. _____ C6H6 + _____ O2 --> _____ CO2 + _____ H2O

d. _____ CH3NH2 + ____ O2 --> _____ CO2 + _____ H2O + _____ N2

 

3. What is the oxidation number of [4 points]

a. N in NO3 - is _____

b. C in C2H6 is _____


4. Write the molecular equation, complete ionic equation, and net ionic equation involving the following reactants in water. If there is no reaction, then write “no reaction”. [12 points]

a. Na2CO3 (aq) + HNO3 (aq) -->

b. lithium sulfate reacts with barium nitrate

 

5. Identify which atom is oxidized / reduced and write its oxidation number near it. [12 points]

a. CH4 + O2 -->  CO2 + H2O

b. H2 + I2 -->  HI