Question

Identity the type of reaction and balance the equation, including the states of matter, for the following reactions:

A. Aqueous aluminum nitrate is added to solid calcium.
Type of Reaction:
A) Synthesis
B) Decomposition
C) Single displacement
D) Double displacement

Answer 1

The reaction between aqueous aluminum nitrate and solid calcium is a single displacement reaction, resulting in the balanced equation 3Ca(s) + 2Al(NO3)3(aq) → 3Ca(NO3)2(aq) + 2Al(s). For the reaction of calcium chloride with sodium fluoride to produce calcium fluoride and sodium chloride, the complete ionic and net ionic equations were provided.

Step-by-step explanation:

Balancing chemical equations involves ensuring that the same number of atoms of each element is present on both sides of the equation. In the case of adding aqueous aluminum nitrate to solid calcium, this is a single displacement reaction, as aluminum (Al), being more reactive, will displace calcium (Ca) from its compound. The balanced chemical equation with states of matter is:

3Ca(s) + 2Al(NO3)3(aq) → 3Ca(NO3)2(aq) + 2Al(s)

Another example is the reaction of calcium chloride (CaCl2) and sodium fluoride (NaF) to produce calcium fluoride (CaF2) and sodium chloride (NaCl). The complete ionic equation for this reaction is:

Ca2+(aq) + 2Cl−(aq) + 2Na+(aq) + 2F−(aq) → CaF2(s) + 2Na+(aq) + 2Cl−(aq)

The net ionic equation simplifies this further to show only the species that undergo a change:

Ca2+(aq) + 2F−(aq) → CaF2(s)