# chemistry

posted by .

Balance each of the following neutralization reactions.
Part A
HBr(aq)+Mg(OH)2(s)-->MgBr2(aq)+H2O(l)
Part B
H3PO4(aq)+NaOH(aq)-->Na3PO4(aq)+H2O(l)

• chemistry -

Trial and error.
HBr(aq)+Mg(OH)2(s)-->MgBr2(aq)+H2O(l)

Here is how I do these. It takes a little practice.
I look on the right and see Mg is ok but Br is Br2. So on the left I place a 2 for HBr.
2HBr(aq)+Mg(OH)2(s)-->MgBr2(aq)+H2O(l)

That takes care of everything except H and O. Since I know the 2 for HBr is right AND the 1 for Mg(OH)2 is right, I can count up H I have4 on the left and make the right equal to that. So I have 2H from 2HBr and I have 2H from (OH)2 which makes 4 H. On the right then I must place a 2 for 2H2O.
2HBr(aq)+Mg(OH)2(s)-->MgBr2(aq)+2H2O(l)

The only thing left is to check O and it SHOULD balance. On the left I have 2O atoms (from (OH)2) and on the right I have 2 O atoms (from 2H2O). Everything balances.

## Similar Questions

1. ### Chemistry

Given: H3PO4(aq) + 3 NaOH(aq) ¨ 3 H2O(l) + Na3PO4(aq) ƒ¢H = -166.5 kJ What is the value for q (heat) if 4.00 g of NaOH reacts with an excess of H3PO4?
2. ### Intro to chemistry

Determine the volume of 2.3 M H3PO4 that can completely react with?
3. ### chemistry

Balance each of the following neutralization reactions. Express your answer as a chemical equation. Identify all of the phases in your answer. Part A: HNO3(aq) + Ba(OH)2(s) ---> Ba(NO3)2(aq) + H2O(l) Part B: H2SO4(aq) + Al(OH)3 …
4. ### chemistry

Balance each of the following neutralization reactions. Express your answer as a chemical equation. Identify all of the phases in your answer. Part A: HNO3(aq) + Ba(OH)2(s) ---> Ba(NO3)2(aq) + H2O(l) Part B: H2SO4(aq) + Al(OH)3 …
5. ### chemistry

25. Which of the two reactions, A or B is a neutralization reaction?
6. ### Chemistry 12

"Add the ionic equations for part one and three, compare the results with the ionic equation for part two" Part 1: NaOH(s) = Na+(aq) +OH-(aq) + heat Part 2: NaOH(s) + H+(aq) +Cl-(aq) = Na+(aq) + Cl-(aq) + H2O(l) + heat Part 3: Na+(aq) …
7. ### Chemistry

what salt results from the neutralization of phosphoric acid with potassium hydroxide?
8. ### Chemistry

what salt results from the neutralization of phosphoric acid with potassium hydroxide?
9. ### chemistry

Which of the following chemical reactions represents a neutralization reaction?
10. ### chemistry

What is the chemical equation that describes the complete neutralization of H3PO4 by NaOH?

More Similar Questions

Post a New Question