Equations

2006 QUESTION THREE: WORD EQUATIONS
Complete the following word equations.

(a) barium chloride + magnesium sulfate → barium sulfate + magnesium chloride
(b) sodium hydrogen carbonate → sodium carbonate + carbon dioxde gas + water
(c) iron + copper sulfate → iron sulfate + copper

2007 QUESTION TWO: EQUATIONS
(a) Complete the following word equations.

(i) magnesium + oxygen ---> magnesium oxide
(ii) calcium carbonate --> calcium oxide + carbon dioxide gas
(iii) lead nitrate + potassium chloride ---> lead chloride + potassium nitrate

(b) Complete and balance the following equations.

(i) I–(aq) + Cl2(aq) --> I2(aq) + 2Cl- (aq)

(ii) Zn(s) + 2AgNO3(aq) --> Zn (NO3)2 (aq) + Ag(s)

Hints
How do you know what kind of reaction it is?
If there is only one reactant then it is a thermal decomposition reaction.
If there are two reactants, both having two parts to their names, then it is a precipitation reaction.
If there are two reactants, one is a metal and the other a chemical with two parts to its name then it is a redox reaction and depending on the reactivity of the metals (refer to data book) the two metals will swap places during the reaction. (see (ii) above)