Tuesday, Mar. 25
SEC 4
FORMATIVE
QUIZ 9
Name:
100
100
Solve the following:
1. Draw the atomic configuration for the following atoms:
Aluminum
Silicon
13 +
14 N
Phosphorous
14 +
14 N
2é
8é
15+
16 N
3é
2é
8é
4é
2é
8é
5é
2. Combine the following, give their name and state whether they are ionic or covalent:
Combination
Name
Ionic or
Covalent
Al2(SO4)3
Aluminum sulphate
Ionic
SiO2
Silicon dioxide
Covalent
Ca3(PO4)2
Calcium phosphate
Ionic
As and O
As2O3
Diarsenic trioxide
Covalent
K and NO3
KNO3
Potassium nitrate
Ionic
Ga and As
GaAs
Gallium arsenide
Ionic
Atoms
Al and SO4
Si and O
Ca and PO4
3. Draw the atomic structure of the following ions:
P+1
F-1
Al+2
9+
10 N
15 +
16 N
2é
8é
4é
13 +
14 N
2é
8é
2é
8é
4. Complete the following neutralization reactions and balance them:
H2CO3
+
Ca(OH)2
→ CaCO3 +
2 H2O
2 H3PO4
+
3 Mg(OH)2
→ Mg3(PO4)2
+
6 H2O
1
1é
5. State an example for the three types of combustion reactions:
a) Rapid: Wood burning
b) Spontaneous: Bomb detonation
c) Slow: Food processing and digestion
6. Write the double displacement reactions for each of the following numbers (Do not forget to balance) and
include the state of each compound, i. e. s, l, g, or aq:
Ammonium
Citrate
Nitrate
Chlorine ion
Bromine ion
Iodine ion
Sulphate
Sulphite
Sulphite
Carbonate
Hydroxide
Phosphate
Chromate
a) Sodium sulphate reacts with calcium chromate to produce two compounds; one of the compounds is a
precipitate.
Na2SO4(aq) +
CaCrO4(aq) →
Na2CrO4(aq)
+
CaSO4(s)
b) Aluminum chloride reacts with ammonium hydroxide to produce two compounds; one of the compounds is
a precipitate.
AlCl3(aq)
+
3 NH4OH(aq) →
Al(OH)3(s)
+
3 NH4Cl(aq)
2
7. What amount of solvent must be added to a solution that contains 200 g of FeS2 in 200 mL of water to
obtain a final concentration of 2 mol/ L?
ERROR
8. What amount of solvent must be added to a solution that contains 75 g of Na 2B4O7 in 100 mL of water to
obtain a final concentration of 0.25 mol/ L?
9. What amount of solvent must be added to a solution that contains115 g of HCl in 240 mL of water to
obtain a final concentration of 0.56 mol/ L?
3
10. What amount of solvent must be added to a solution that contains265 g of PbO 2 in 120 mL of water to
obtain a final concentration of 3 mol/ L?
11. What amount of solvent must be added to a solution that contains140 g of CrBr 2 in 80 mL of water to
obtain a final concentration of 4.1 mol/ L?
14. What amount of solvent must be added to a solution that contains 230 g of SnF4 in 60 mL of water to
obtain a final concentration of 1.25 mol/ L?
4
15. What amount of solvent must be added to a solution that contains140 g of C 16H36N in 20 mL of water to
obtain a final concentration of 0.15 mol/ L?
16. Balance the following equations.
a)
d)
H2SO4 →
2 KOH +
K2SO4 +
b)
8 NH3 + 3 Cl2 → N2 +
c)
2 Al +
3 Mg +
2 H2O
6 NH4Cl
6 HCl → 2 AlCl3 + 3 H2
2 H3PO4 → Mg3(PO4)2 +
3 H2
e) 2 Fe2S3 +
9 O2 → 2 Fe2O3 + 6 SO2
PbO2 + 4 HCl → PbCl2 + 2 H2O +
f)
g)
2 Cu(NO3)2 → 2 CuO +
h) 2 Al(OH)3 + 3 H2SO4 --->
4 NO2 +
Cl2
O2
Al2(SO4)3 + 6 H2O
17. Balance and solve the following equations:
Zn + HCl ---> ZnCl2 + H2
How many moles of HCl are needed if 150 mL of ZnCl2 concentrated at 6 mol/L are produced in this
equation
5
KClO3 ---> KCl + O2
How many moles of KClO3 are needed if 150 mL of KCl concentrated at
0.7 mol/100 mL are produced in this equation
S8 + F2 ---> SF6
How many moles of SF6 are produced if 75 mL of F2 concentrated at
0.354 mol/mL are used in this equation
6
Fe + O2 ---> Fe2O3
How many grams of O2 are needed if 66 mL of Fe2O3 concentrated at 3 mol/L are produced in this equation
C2H6 + O2 ---> CO2 + H2O
How many grams of C2H6 are needed if 300 mL of CO2 concentrated at
0.85 mol/mL are produced in this equation
7
Na + H2O ---> NaOH + H2
How many grams of NaOH are produced if 0.116 L of H2 concentrated at
0.456 mol/10 mL are produced in this equation
C7H6O2 + O2 ---> CO2 + H2O
How many grams of C7H6O2 are needed if 3.657 L of CO2 concentrated at 656 mL mol/100000 mL are
produced in this equation
18. Translate the following equation and balance it:
Chlorine was discovered in 1774 by the Swedish chemist Carl Wilhelm Scheele. It was then used
in WWI as a weapon that caused blindness if not fatalities. It was made by reacting manganese
dioxide powder with a hydrochloric acid solution to obtained chlorine gas in addition to a solution
of manganese dichloride (MnCI2) and water.
Write the reaction while including the state of each compound i. e. s, l, g, or aq:
MnO2(s) + 4 HCl(aq) → Cl2(g) + MnCl2(aq) + 2 H2O(l)
19. The reaction caused by the burning of butane in air is represented by the following equation:
8
2 C4 H10(g) + 13 O2(g)  8 CO2(g) + 10 H2 O(g) + Energy
During a laboratory experiment, you react 29 g of butane (C4H10) in the presence of oxygen gas (O2).
You observe that 88 g of carbon dioxide (CO2) and 45 g of water vapour (H2O) form.
What mass of oxygen gas did you use in this experiment?
104 g
20. In the laboratory, you are given 150 mL of a potassium chloride (KCl) solution whose concentration is
20 g/L. With this solution, you have to prepare 50 mL of another potassium chloride solution whose
concentration is to be 12 g/L. What volume of the initial given solution do you need to prepare the new
solution?
9