SOLUTIONS TO EXERCISES, LESSON 2
1.
sodium hydroxide; hydrochloric acid; sodium chloride; water
one, one (para 2-1)
2.
silver nitrate; potassium chloride; potassium nitrate; silver chloride
precipitates (para 2-1)
3.
Ca(OH)2
HNO3
Ca(NO3)2; H2O
Ca(OH)2 + HNO3
---->
Ca(NO3)2 + H2O
1
Ca; 1 Ca
2
OH; 1 OH
1
H; 1 H
1
NO3; 2 NO3
NO3
OH
Ca(OH)2 + 2HNO3 ---->Ca(NO3)2 + 2 HOH
one, two; two, two
balanced (paras 2-2, 2-3)
4.
H2SO4 + Fe(OH)3 --->Fe2(SO4)3 + HOH
2
H; 1 H
1
SO4; 3 SO4
1
Fe; 2 Fe
3
OH; 1 OH
3H2SO4
+
2Fe(OH)3 ---->Fe2(SO4)3 + 6HOH (paras 2-2, 2-3)
5.
Fe + S ----> FeS (paras 2-2, 2-3)
Na2CO3 + HCl ----> 2 NaCl + H2O + CO2 ↑
6.
gas (paras 2-2, 2-3)
7.
gives off (para 2-5a(1))
8.
takes in (para 2-5a(2))
MD0803
2-35