At Westonci.ca, we connect you with the best answers from a community of experienced and knowledgeable individuals. Get the answers you need quickly and accurately from a dedicated community of experts on our Q&A platform. Get quick and reliable solutions to your questions from a community of experienced experts on our platform.

If you reverse Reaction 2 and combine the reactions, which substances do not cancel? Check all that apply:

- [tex]H_2[/tex]
- [tex]HCl[/tex]
- [tex]H_2O[/tex]
- [tex]Mg[/tex]
- [tex]MgO[/tex]
- [tex]MgCl_2[/tex]
- [tex]O_2[/tex]


Sagot :

To determine which substances do not cancel when combining the two reactions with the second reaction reversed, follow these steps:

1. Identify the reactants and products for each reaction:
- Reaction 1:
- Reactants: [tex]\( \text{H}_2 \)[/tex], [tex]\( \text{O}_2 \)[/tex], [tex]\( \text{Mg} \)[/tex]
- Products: [tex]\( \text{HCl} \)[/tex]
- Reaction 2:
- Reactants: [tex]\( \text{HCl} \)[/tex], [tex]\( \text{Mg} \)[/tex], [tex]\( \text{O}_2 \)[/tex]
- Products: [tex]\( \text{H}_2 \text{O} \)[/tex], [tex]\( \text{MgO} \)[/tex], [tex]\( \text{MgCl}_2 \)[/tex]

2. Reverse Reaction 2 to get new reactants and products:
- Reverse Reaction 2:
- Reactants: [tex]\( \text{H}_2 \text{O} \)[/tex], [tex]\( \text{MgO} \)[/tex], [tex]\( \text{MgCl}_2 \)[/tex]
- Products: [tex]\( \text{HCl} \)[/tex], [tex]\( \text{Mg} \)[/tex], [tex]\( \text{O}_2 \)[/tex]

3. Combine the reactants and products from both reactions:
- Total reactants from Reaction 1 and reversed Reaction 2:
- [tex]\( \text{H}_2 \)[/tex], [tex]\( \text{O}_2 \)[/tex], [tex]\( \text{Mg} \)[/tex], [tex]\( \text{H}_2 \text{O} \)[/tex], [tex]\( \text{MgO} \)[/tex], [tex]\( \text{MgCl}_2 \)[/tex]
- Total products from Reaction 1 and reversed Reaction 2:
- [tex]\( \text{HCl} \)[/tex], [tex]\( \text{HCl} \)[/tex], [tex]\( \text{Mg} \)[/tex], [tex]\( \text{O}_2 \)[/tex]

4. Identify and cancel out the substances that appear on both sides:
- Substances on both reactant and product sides cancel each other out.
- Reactants (before cancellation): [tex]\( \text{H}_2 \)[/tex], [tex]\( \text{O}_2 \)[/tex], [tex]\( \text{Mg} \)[/tex], [tex]\( \text{H}_2 \text{O} \)[/tex], [tex]\( \text{MgO} \)[/tex], [tex]\( \text{MgCl}_2 \)[/tex]
- Products (before cancellation): [tex]\( \text{HCl} \)[/tex], [tex]\( \text{HCl} \)[/tex], [tex]\( \text{Mg} \)[/tex], [tex]\( \text{O}_2 \)[/tex]
- Cancel out common substances:
- [tex]\( \text{O}_2 \)[/tex] (appears in both reactants and products)
- [tex]\( \text{Mg} \)[/tex] (appears in both reactants and products)
- [tex]\( \text{HCl} \)[/tex] (appears twice in products, so cancels out once, leaving one [tex]\( \text{HCl} \)[/tex] in products)

5. List the substances that do not cancel:
- Remaining reactants: [tex]\( \text{H}_2 \)[/tex], [tex]\( \text{H}_2 \text{O} \)[/tex], [tex]\( \text{MgO} \)[/tex], [tex]\( \text{MgCl}_2 \)[/tex]
- Remaining products: [tex]\( \text{HCl} \)[/tex]
- Combine the remaining substances:
- Substances left after combining: [tex]\( \text{O}_2 \)[/tex], [tex]\( \text{MgO} \)[/tex], [tex]\( \text{H}_2 \)[/tex], [tex]\( \text{HCl} \)[/tex], [tex]\( \text{MgCl}_2 \)[/tex], [tex]\( \text{H}_2 \text{O} \)[/tex], [tex]\( \text{Mg} \)[/tex]

Therefore, the substances that do not cancel out are:
- [tex]\( \text{H}_2 \)[/tex]
- [tex]\( \text{HCl} \)[/tex]
- [tex]\( \text{H}_2 \text{O} \)[/tex]
- [tex]\( \text{Mg} \)[/tex]
- [tex]\( \text{MgO} \)[/tex]
- [tex]\( \text{MgCl}_2 \)[/tex]
- [tex]\( \text{O}_2 \)[/tex]
Visit us again for up-to-date and reliable answers. We're always ready to assist you with your informational needs. We appreciate your time. Please revisit us for more reliable answers to any questions you may have. Thank you for trusting Westonci.ca. Don't forget to revisit us for more accurate and insightful answers.