Please check these balanced equations

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In summary, balanced equations are mathematical representations of chemical reactions that follow the law of conservation of mass. It is important to check for balanced equations to ensure that no atoms are created or destroyed during the reaction. To check if an equation is balanced, one must count the number of atoms of each element on both sides of the equation and adjust the coefficients if necessary. Some common mistakes when balancing equations include forgetting to count the number of atoms, not adjusting coefficients correctly, and not using the lowest possible whole numbers. Equations can be balanced without changing the chemical formula, but in some cases, it may be necessary to do so to properly balance the equation.
  • #1
jzq
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[tex]2Cu+6HNO_3\xrightarrow~2Cu(NO_3)_2+3H_2O+2NO_2[/tex]

[tex]2Cu(NO_3)_2~+~2Na_2CO_3~+~H_2O\xrightarrow~CuCO_3~\cdot~Cu(OH)_2~+~4NaNO_3~+~CO_2[/tex]

[tex]2HNO_3+Na_2CO_3\xrightarrow~2NaNO_3+CO_2+H_2O[/tex]

[tex]CuCO_3~\cdot~Cu(OH)_2\xrightarrow{\Delta}~2CuO+H_2O+CO_2[/tex]

[tex]CuO+H_2SO_4\xrightarrow~CuSO_4+H_2O[/tex]

[tex]CuSO_4+Mg\xrightarrow~MgSO_4+Cu[/tex]

[tex]H_2SO_4+Mg\xrightarrow~MgSO_4+H_2[/tex]
 
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  • #3
dextercioby said:
They look okay.

Daniel.
Thank you.
 

1. What are balanced equations?

Balanced equations are mathematical representations of chemical reactions that show the relationship between the reactants and products. They follow the law of conservation of mass, meaning that the number of atoms of each element in the reactants must be equal to the number of atoms of that element in the products.

2. Why is it important to check for balanced equations?

Checking for balanced equations is important because it ensures that the chemical reaction obeys the law of conservation of mass. This means that no atoms are created or destroyed during the reaction, and the reactants and products have the same number of atoms of each element.

3. How do you check if an equation is balanced?

To check if an equation is balanced, you need to count the number of atoms of each element on both sides of the equation. If the numbers are equal, the equation is balanced. If they are not equal, you need to adjust the coefficients (numbers in front of the chemical formulas) until the equation is balanced.

4. What are some common mistakes when balancing equations?

Some common mistakes when balancing equations include forgetting to count the number of atoms of each element, not adjusting the coefficients correctly, or not using the lowest possible whole numbers for the coefficients. It is also important to double-check that all elements are balanced, including those in polyatomic ions and compounds with multiple elements.

5. Can equations be balanced without changing the chemical formula?

Yes, equations can be balanced without changing the chemical formula. This is because the coefficients only affect the number of each type of molecule in the equation, not the actual identity of the molecules. However, in some cases, it may be necessary to change the chemical formula in order to balance the equation properly.

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