Question

Balance the chemical reaction :

a) K + H2O → KOH + H2

b) Pb(NO)3 → PbO + NO2 + O2

c) Zn + AgN03 → Zn(NO3)2 + O2

d) NaHCO3 + HCl → NaCl + H2O + CO2

e) Fe + HCl → FeCl2 + H2
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Answer 1

Answer:

A) Balancing Strategies: This is a single replacement reaction where the potassium atom replaces the hydrogen in H20. When you balance this equation be sure to count all of the hydrogen atoms on the product side of the equation. You should have four hydrogen atoms on the product side of the equation.

B) Balance this equation: Pb (NO3)2 → PbO + NO2 + O. 2Pb(NO3)2 → 2PBO + 4NO2 + O2. It is a decomposition reaction where a single type of chemical compound breaks down into two or more elements or new compounds. The produced lead monoxide PbO is yellow coloured and nitrogen oxide is liberated in the form of reddish fumes.

C). Balancing Strategies: In this single displacement reaction Zn is replacing the Ag in AgNO3. To balance this equation it is easiest to consider the NO3 to be one item. There is one NO3 on the reactant and two on the product side of the equation. Put a "2" in front of the AgNO3 to balance the NO3 (nitrate).

D). Sodium carbonate + Hydrochloric acid → Sodium chloride + Water + Carbon dioxide

Na2CO3(aq)+2HCl(aq)→2NaCl(aq)+CO2(g)+H2O(l)

E). Fe + HCl =》 FeCl2 + H2. Fe(s) + 2HCl(l) =》FeCl2(s) + H2(g).

Answer 2

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