CHAPTER 6.1 Study Guide Chemical Equations
Use with text pages 190 – 201
In each blank, write the word or phrase
that best completes the following passage.
When a piece of magnesium metal is added to
dilute hydrochloric acid, fizzing occurs and hydrogen gas is released from the
mixture. The fizzing is evidence that a(n) (1) ______________ has occurred
between magnesium and hydrochloric acid. The name given to either magnesium or
hydrochloric acid in this case is (2) _______________, and the hydrogen gas
that is released is called a(n) (3) ____________ of the reaction. Some other
indications that reactions have occurred might be change of color or (4)
_________________, or formation of a solid (5) ____________. If a thermometer
is placed into a mixture undergoing a reaction, you might observe that the
temperature has gone up or down, indicating that (6) ______________ was being
released or absorbed. The shorthand form by which a reaction is represented is
called a(n) (7) _________________. In using this method of representation, you
must satisfy the (8) ____________, a principle that states that matter is
neither created nor destroyed. In order to satisfy this principle, you normally
select the proper numerical (9) __________________ to indicate the number of
units of each substance taking part in the chemical change.
In the space provided, express in words
each of the numbered terms or symbols in the following chemical equation.
Mg(s) + 2HCl(aq)
--> MgCl2(aq) + H2(g)
10. Mg
11. (s)
12. +
13. 2
14. HCl(aq)
15. (aq)
16. -->
17. MgCl2(aq)
18. H2
19. (g)
Write a word equation and a balanced
chemical equation for each of the reactions described below.
20. Aluminum metal burns in pure oxygen gas
to produce solid aluminum oxide.
word equation:
chemical equation:
21. When solid mercury(II) oxide is heated,
it breaks down to form liquid mercury and oxygen gas.
word equation:
chemical equation:
22. The addition of a solution of ammonium
sulfate to a solution of lead(II) nitrate results in the formation of ammonium
nitrate, which remains in solution, and lead(II) sulfate, which settles out of
solution as a solid.
word equation:
chemical equation:
23. Copper metal and iron(II) nitrate in
solution are formed when iron metal is added to a solution of copper (II)
nitrate.
word equation:
chemical equation:
24. Hydrogen sulfide gas reacts with pure
oxygen gas to form water vapor and solid particles of sulfur.
word equation:
chemical equation:
Balance each of the following chemical
equations.
25. P(s) + O2(g) --> P4O10(s)
26. Fe(OH)3(s) --> Fe2O3(s)
+ H2O(g)
27. Na2CO3(aq) + Ca(OH)2(aq)
--> NaOH(aq) + CaCO3(s)
28. K3PO4(aq) + MgCl2(aq) -->
Mg3(PO4)2(s) + KCl(aq)
29. Mg(HCO3)2(aq) + HCl(aq)
--> MgCl2(aq) + H2O(l) + CO2(g)
30. Bi(NO3)3(aq) + CaI2(aq) -->
BiI3(s) + Ca(NO3)2(aq)
31. Cu(s) + H2SO4(aq) -->CuSO4(aq) +
H2O(l) + SO2(g)