Aqueous magnesium hydroxide has been used for many uears because it reacts with HCL to produce magnesium chloride
So far I got
Mg(pos. 2 charge)OH2(-1 charge) + HCL >>>>>>> Mg(+2 charge)Cl2(-1 charge) + H2O
did i get that rite?
Mg(OH)2 + 2HCl to MgCl2 +2H2O
Why don't u use cross multiply Mg with OH
and have MgOH2 ?
because it is Magnesium Hydroxide, which has a charge of -1 and 2 atoms of both hydrogen and oxygen are needed to neutralize the charge
The only way to balance polyatomic ions is to use paranthesis?
right. The OH ion is a unit consisting of 1 O atoms + 1 H atoms. The O atom has a charge of -2 and the H atom has a charge of +1; therefore, the OH ion has a NET charge of -1 and to show that it is an entity and not separate, we write it as (OH)^-1.
It looks like you are on the right track, but there are a couple of corrections and clarifications.
The chemical formula for magnesium hydroxide is Mg(OH)2, not MgOH2. The hydroxide ion (OH-) carries a negative charge, so two hydroxide ions are needed to balance the positive charge of the magnesium ion (Mg2+).
Also, the balanced chemical equation for the reaction between magnesium hydroxide and hydrochloric acid (HCl) is:
Mg(OH)2 + 2HCl -> MgCl2 + 2H2O
In this equation, the magnesium hydroxide and hydrochloric acid react to form magnesium chloride (MgCl2) and water (H2O). The subscripts indicate the number of each type of atom in the molecule or ion.
Remember that when balancing chemical equations, it is important to keep the number of atoms on each side of the equation equal. Additionally, charges need to be balanced, but we don't include charges in the final balanced equation because they are inherent in the chemical formulas.
I hope this helps clarify the equation for you!