Homework Help: Chemistry+Balancing equations

Posted by Chopsticks on Tuesday, February 3, 2009 at 11:17pm.

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?

Chemistry+Balancing equations - Anonymous, Tuesday, February 3, 2009 at 11:21pm
Mg(OH)2 + 2HCl to MgCl2 +2H2O
Chemistry+Balancing equations - Chopsticks, Tuesday, February 3, 2009 at 11:23pm
Why don't u use cross multiply Mg with OH

and have MgOH2 ?
Chemistry+Balancing equations - Anonymous, Tuesday, February 3, 2009 at 11:33pm
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
Chemistry+Balancing equations - Chopsticks, Tuesday, February 3, 2009 at 11:35pm
The only way to balance polyatomic ions is to use paranthesis?
Chemistry+Balancing equations - DrBob222, Wednesday, February 4, 2009 at 1:40pm
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.

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