Download Reactions review

ORHS Review Nuclear/ Predicting Products

Ca(s) + HCl(aq)
Name: _____________________________
CaCl2(aq) + H2(g)
1.
The skeleton equation above represents a chemical reaction. Which of these are the
Reactants___________________
Products___________________
2.
A balanced chemical equation is a direct representation of the law of conservation of
________.
3.
In a chemical equation, the number written in front of the chemical formula is the _______.
a. Reactant
b. superscript
c. Subscript
d. Coefficient
4.
In order to balance a chemical equation one must use ___________________________
5.
The skeleton equation in number one violates the law of conservation of mass. Which of
these is the correct balanced chemical equation?
a. 2Zn(s) + HCl(aq) 
2ZnCl2(aq) + H2(g)
b. Zn(s) + 2HCl(aq) 
ZnCl2(aq) + 2H2(g)
c. Zn(s) + 2HCl(aq) 
ZnCl2(aq) + H2(g)
d. 2Zn(s) + HCl(aq) 
2ZnCl2(aq) + H2(g)
Balance the following reactions & write the type of reaction
6. ___ H2 +
___ Br2  ___ HBr

7. __ C + __ Fe2O3
_______________________
__ Fe + __ CO
_______________________
8. __ SiO2 + __ HF  __ SiF4 + __ H2O
_______________________
9. __ K + __ H2O 
10.
___ Mg
+

___ H2SO4
11. ___ Pb(NO3)2
12. ___ C3H6
__ KOH + __ H2
+

___ NaI
___ MgSO4
___ NaNO3
+ ___ O2  ___ CO2
13. __MgCO3  ___ MgO
+
_______________________
+
___ H2
______________________
+
___ PbI2 ____________________
+ ___ H2O
_____________________
___ CO2
_____________________
1
14.
Which additional product balances the reaction above?
a.
b.
c.
d.
4OH(aq)
CH4(g)
H2O2(g)
2H2O(g)
Predict the products of the following reactions and balance
15. ___ AgNO3
+
___ H2S 
16. ___ C6H6O
+
___ O2 
17. ___ HCl
18. ___ Al
19. ___ K
20. ___ Be
+
___ Fe2O3 

+ ___ Cl2
+
___H2O
+
21. ___ Zn(OH)2
___ O2
+


___ H3PO4

22. What are the products of the reaction between barium hydroxide and hydrochloric acid?
a. Barium chloride and water
b. Barium chloride and barium hydride
c. Barium hydroxide and water
d. chloric acid and barium
23. In the combustion reaction of propane, C3H8, what are the products?
c. C3H8 and O2
d. O2 and H2O
c. C3H8 and CO2
d. H2O and CO2
24. In the lab you place a piece of silver in sodium chloride solution. After two hours what would you
expect to see?
a. The silver metal would be replaced by sodium metal
b. Bubbles would be produced because of the reaction
c. There would be no reaction visible because silver cannot replace sodium
d. Silver will combine with sodium forming a green chloride solution.
25. Potassium chloride combines with Copper II sulfate to produce which products?
2
26. Which of the series of metals below are listed in increasing reactivity
a. lead < zinc < calcium < potassium
b. potassium < calcium < zinc < lead
c. calcium < lead < potassium < zinc
d. None of the above. All metals have the same reactivity
Predict the products for the following reactions in words and balanced formulas
27.
magnesium + nitric acid (HNO3) 
28.
calcium + oxygen 
29.
Sodium Iodide + Bromine 
F. Chemical Reactions
30. Name the reaction types for the following chemical reactions?
HCl  H2 + Cl2 ______________________________
H2 + O2  H2O ______________________________
Li2SO4 + BaCl2  LiCl + BaSO4 ______________________________
CH4 + O2  H2O + CO2 ______________________________
31. The law of conservation of mass states that mass cannot be –
a. created or destroyed
b. heated or cooled
32.
CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)
For the reaction above, if 46.0 g of methane (CH4) reacts with 96.0 g of oxygen to produce
54.0 g water, how much carbon dioxide is produced?
Work:
Answer: ___________
Balance the following equations and predict the type of reaction:
33. __Na + __Cl2 
__NaCl
Type= ____________________
Ratio of Coefficients = _____________
34. __FeO + __HCl 
__FeCl2 + __H2O
Type= ________________________
Ratio of Coefficients = _____________
35. __C4H10 + __O2

36. __Al + __CuSO4 
__CO2 + __H2O
Type= ________________________
__Al2(SO4)3 + __Cu
Type= ________________________
3
37. __P + __O2 
__P2O5
38. __Al2O3 + __HBr

Type= ________________________
__AlBr3 + __H2O
Type= ________________________
39. Are the following atoms balanced on each side of the equation?
40. What is the mass of the solution in the second flask in this synthesis reaction?
100g Ca
?gS
225g CaS
41. A metallic alloy is created by the physical process of melting two metals together. What type of
matter would this be classified as?
a. Compound
b. Element
c. Homogeneous mixture
d. heterogeneous mixture
42. Rusting is an example of a chemical change. The ablility of an object to rust is a a. physical property
b. chemical property
c. physical change
43. Know all rules for identifying and rounding with significant figures.
All __________________ numbers are significant.
Zeros that are __________________ non-zero numbers are
significant
If there is a decimal in the number, go right until you hit a
non-zero number, all zeroes after that are significant.
If there is no decimal in the number, only “sandwiched
zeroes are sig. (End zeroes don’t count if no decimal )
Subtract or add, use P.A.D. to round. Divide or
multiply, look for least sig fi in factors of the
problem to know how many digits to round to.
333 has __ sig figs 3333 has __ sig figs
303
3003 has _______ sig figs
0.000003000 has ________ sig figs
0.00300000 has ________ sig figs
30300000000 has ____ sig figs
30000003000 has ____ sig figs
2.5673 – 1.00 = 1.60
2.5673 /1.00 = 2.57
2.5673 – 1 = 2 (rounded to no P.A.D.)
5.000 + 5.0000 = 10.000 5.00 x 5.000 = 25.0
4
5