Download Unit 5 Study Guide

Unit 5 Study Guide: Chemical Reactions
1. What are the 7 diatomic molecules?
2. What does each of the following symbols mean?
a. (l)
d. (g)
b. (aq)
e. ∆ written above the arrow
c. (s)
3. What are the signs of a chemical reaction?
4. What is a catalyst?
5. In order to balance an equation, what numbers can you add/change?
a.
The coefficients
c.
b.
The subscripts
d.
6.
The superscripts
The molar mass
In which type of reaction does one element replace another element that is part of a compound?
7. What type of reaction involves a hydrocarbon reacting with oxygen to produce carbon dioxide and water?
8.
2 H2O2 → O2 + 2 H2O
is what type of reaction?
9. Balance the following equation:
C4H10 + O2 →
CO2 + H2O
10. What type of reaction is this: CuNO3 (aq) + NaCl (aq) → CuCl(s) + NaNO3(aq)?
11. What type of reaction is this? 2Mg + O2 → 2MgO ?
12. What are the coefficients needed to correctly balance the equation:
Hg(NO3)2 (aq)
+
KI (aq) →
HgI2(s)
+ KNO3 (aq)
13. Which of the following compounds is insoluble in water?
a. NaNO3
b. FeCl2
c. (NH4)2CO3
d. Cu(OH)2
14. Which element can replace copper in a single replacement reaction?
a. Mg
c. Neither
b. Pb
d. Both
15. Which of the following displacement reactions will NOT occur?
a) CuSO4(aq) + Zn(s) ---> Cu(s) + ZnSO4(aq)
b) 2NaNO3(aq) + Zn(s) ---> 2Na(s) + Zn(NO3)2(aq)
c) 2AgNO3(aq) + Zn(s) ---> 2Ag(s) + Zn(NO3)2(aq)
d) 2HCl(aq) + Zn(s) ---> H2(g) + ZnCl2(aq)
16. An iron rod is placed in a beaker of copper (II) nitrate solution. Write an equation for the reaction that occurs.
(Predict the products and balance the equation). ( The iron is Fe2+)
17. Write a balanced equation for the reaction between sodium bromide solution and silver nitrate solution. What is
the precipitate that forms?
18. Write the balanced equation for the combustion of C4H8.
19. Write the TOTAL IONIC EQUATION for the following reaction:
Magnesium nitrate and Sodium carbonate solutions react to form solid Magnesium carbonate and sodium
nitrate solution.
20. What is the NET IONIC EQUATION for the reaction between aqueous solutions of sodium chloride and lead (II)
nitrate?
21. What is the percentage of Copper in Copper (II) oxide?
22 Write the formula for each of the following compounds
a. calcium fluoride
c. hydrogen cyanide
b. sodium sulfate
d. potassium bromide
23. Potassium has 19 protons and 19 electrons. What will happen if potassium loses one of its electrons?
24. What is the molar mass of Al(CN)3?
25. What is the molar mass of copper (I) phosphate?
26. This is a representation of the reaction of hydrogen, H2, with bromine, Br2, to form hydrogen bromide, HBr.
Which best represents the product of the reaction at completion?
27. Acetylene is burned in welding torches. It is composed of 92.26 percent carbon and 7.74 percent hydrogen. Its
molar mass is 26.02 g/mol. Calculate the empirical formula and molecular formula of acetylene.