Calcium hydroxide + hydrochloric acid mc012-1.jpg calcium chloride + water

which is the corresponding formula equation?

Explanation:

First of all, let's try to identify the different substances involved in the reaction:

- calcium hydroxide: calcium is the element , while hydroxide corresponds to the ion . Calcium has 2 valence electrons, so the calcium ion is , and since the ion has only one negative charge, we need two of them to combine with the calcium ion, therefore:

- hydrochloric acid: this is an acid, so with one ion of hydrogen , and the other element is the chlorine, which in the ion form is , so the hydrochloric acid is

- calcium chloride: this is the combination of the calcium ion, , with the chlorine ion, , so the compound is

- Water: this is given by

so, the reaction is

However, this reaction is not balanced yet: in fact, we have 2 atoms of oxygen on the left and only one on the right. Moreover, we have 3 atoms of hydrogen on the left and only 2 on the right. Therefore, in order to balance it, we must write: