One of the stumbling blocks in the first steps in studying chemical laws and foundations is writing chemical reactions. Therefore, questions about the interaction of CaCl2, H2SO4 do not even occur periodically, but systematically. Let's analyze the main "problem" points.
Molecular Equation
The interaction between calcium chloride (salt) and sulfuric acid proceeds according to the exchange mechanism.
Distinctive features of such a reaction are:
- two inlet compounds (starting materials);
- two outlet connections (products);
- complete absence of simple substances.
By exchanging reaction groups with each other, the reagents are modified, and the equation takes the form:
CaCl2 + H2SO4 = CaSO4 + 2HCl.
As you can see, two complex substances, changing ions, form completely different compounds: a new salt (CaSO4) and hydrochloric acid (HCl).
Possibility of flowing to the end
This question can easily be answered by writing down the reaction equation in molecular form for CaCl2, H2SO4. Everything will depend on the type of products. To the end, the process goes in the case of education:
- sparingly soluble substance (precipitate);
- volatile compound (gas);
- slightly dissociating reagent (water, weak electrolyte).
In the case considered for CaCl2, H2SO4, among the reaction products is calcium sulfate, a sparingly soluble compound that precipitates according to the table.
Consequently, the exchange process will go through.
Abbreviated ionic form between CaCl2, H2SO4
Having painted all soluble compounds into ions and having reduced the repeating reaction groups, we obtain two desired equations:
- total ionic form between CaCl2, H2SO4
ca 2+ + 2cl - + 2h + + so 4 2- = caso 4 + 2h + + 2cl -
ca 2+ + so 4 2- = caso 4 .
It should be remembered that only soluble salts, acids, and bases sign for ions (this is easily determined by special tables). Weak electrolytes such as carbonic or acetic acid are always written in molecular form.
Now you know how the interaction between calcium chloride (salt) and sulfuric acid occurs.