Quick Check: Balancing Chemical Reactions

  • Thread starter J_o_S
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H_{2}CO_{3}In summary, equations have been written and balanced for reactions involving zinc sulphate, barium nitrate, gold (III) sulphate, barium chloride, zinc, mercourous nitrate, tin, antimony (V) chloride, calcium, water, ferrous bromide, phosphoric acid, ethane, C2H4, calcium carbonate, and hydrobromic acid.
  • #1
J_o_S
18
0
Hi, I'm pretty sure I have the idea here. but can i just get a "looks good" from someone? :smile:

Write and balance equations for the following reactions:
a) zinc sulphate + barium nitrate →
ZnSO4 + Ba(NO3)2 --> Zn(NO3)2 + BaSO4


b) gold (III) sulphate + barium chloride →
Au2(SO4)3 + 3BaCl2 --> 3BaSO4 + 2AuCl3


c) zinc + mercourous nitrate →
Zn + HgNO3 --> Hg + Zn(NO3)

d) tin + antimony (V) chloride →
5Sn + 2SbCl5 --> 5SnCl2 + 2Sb


e) calcium + water →
Ca + 2H2O ---> Ca(OH)2 + H2

f) ferrous bromide + phosphoric acid →
3FeBr2 + 2H3PO 4 --> 6HBr + Fe3(PO4)2


g) the complete combustion of ethane, C2H4 →
C2H4 + 3O2 --> 2CO2 + 2H2O


h) calcium carbonate + hydrobromic acid →
CaCO3+ 2Hbr --> Ca(BrO3)2+ H2CO3


Thanks for your time
 
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  • #2
The last (h)) should be,of course

[tex] CaCO_{3}+2HBr\rightarrow CaBr_{2}+H_{2}CO_{3} [/tex]

Daniel.

P.S.You may also write ...+H_{2}O+CO_{2}
 
  • #3
and help! Your equations look good to me. Great job balancing the reactions and including the correct formulas for each compound. Keep up the good work!
 

1. What is the purpose of balancing chemical reactions?

The purpose of balancing chemical reactions is to ensure that the number of atoms of each element is equal on both sides of the reaction. This is important because in chemical reactions, atoms are neither created nor destroyed, so the number of each type of atom must be the same before and after the reaction.

2. How do you know when a chemical reaction is balanced?

A balanced chemical reaction has the same number of atoms of each element on both the reactant and product sides of the equation. Additionally, the coefficients (numbers in front of the chemical formulas) must be in the simplest ratio possible.

3. What are the steps to balancing a chemical reaction?

The steps to balancing a chemical reaction are as follows:

  • Write the unbalanced equation using correct chemical formulas for all reactants and products.
  • Count the number of atoms of each element on both sides of the equation.
  • Add coefficients to the molecules as needed to balance the number of atoms of each element.
  • Check that the new coefficients result in the simplest ratio possible.
  • If the equation is not balanced, repeat the process until it is balanced.

4. Are there any shortcuts for balancing chemical reactions?

Yes, there are a few shortcuts that can be used to balance chemical reactions. These include the "inspection" method, where the coefficients are determined by visually inspecting the equation and making adjustments as needed, and the "half-reaction" method, where the reaction is split into two half-reactions and balanced separately before combining them.

5. How do you handle balancing reactions with polyatomic ions?

When balancing reactions with polyatomic ions, treat the entire ion as a single unit and balance it as you would any other molecule. Additionally, make sure to balance the elements within the polyatomic ions as well. If there are multiple polyatomic ions on one side of the equation, balance them as a group first and then balance the remaining elements.

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