One of the stumbling blocks in the first steps of studying chemical patterns and basics is writing chemical reactions. Therefore, questions about the interaction of CaCl2, H2SO4 are encountered not even periodically, but systematically. Let's analyze the main "problem" points.
Writing a molecular equation
The interaction between calcium chloride (s alt) and sulfuric acid proceeds through the exchange mechanism.
The hallmarks of such a reaction are:
- two input compounds (starting materials);
- two output connections (products);
- complete absence of simple substances.
Exchanging reactive groups with each other, the reagents change, 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 s alt (CaSO4) and hydrochloric acid (HCl).
Possibility of leaking to the end
You can easily answer this question by writing the reaction equation in molecular form for CaCl2, H2SO4. It will depend on the type of product. The process goes to the end in case of education:
- sparingly soluble substance (precipitate);
- volatile compound (gas);
- low dissociating reagent (water, weak electrolyte).
In the case considered for CaCl2, H2SO4, among the reaction products there is calcium sulfate - a poorly soluble compound that precipitates, according to the table.
Consequently, the exchange process will go to the end.
Short ionic notation between CaCl2, H2SO4
Describing all soluble compounds into ions and reducing the recurring reactive groups, we get the two desired equations:
full ionic notation between CaCl2, H2SO4
ca2+ + 2cl- + 2h+ + so 42-=caso4 + 2h+ + 2cl -
abbreviated equation
ca2+ + so42-=caso 4.
It should be remembered that only soluble s alts, acids, bases are written for ions (this is easily determined by special tables). Weak electrolytes like carbonic acid or acetic acid are always written in molecular form.
Now you know how the interaction between calcium chloride (s alt) and sulfuric acid occurs.
